Ask Caleffi
Ask Caleffi
#9 The heat is on... but for who?
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It can be a time-consuming project to troubleshoot why a zone relay board doesn't "appear" to be working, especially when the heat is literally ON for the contractor, but OFF for their customer.
Greg and Dan take our audience through a step-by-step process of isolating and solving the "no-heat" calls including how to locate the source of the power loss. It's (another) don't-miss episode!
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00:02
[Music]
00:06
welcome to ask Caleffi
00:08
the podcast that dives into real-life
00:10
problems that plumbing and hvac
00:12
technicians face in the field
00:13
we're your hosts from the Caleffi tech
00:15
support team i'm greg tubbs
00:17
and i'm dan firkus welcome we look
00:20
forward to sharing some stories from our
00:21
tech calls and using our background and
00:23
expertise to make your days a little
00:28
easier
00:30
hey there welcome back here we are on
00:32
episode nine we're going to be talking
00:34
about troubleshooting
00:35
zone relays today how we doing dan we're
00:37
doing good welcome back everybody thanks
00:39
for tuning in
00:40
so today's topic can get pretty time
00:43
consuming
00:44
real fast i mean you know we'll try to
00:47
keep this discussion
00:49
as more of an overview listeners
00:52
if you're having issues just give us a
00:54
call because these things can get off in
00:55
the weeds
00:56
real fast absolutely there's a you know
00:58
a lot of different directions you can
01:00
take this i think we're going to do just
01:01
an overview on troubleshooting today
01:03
yeah i mean we get plenty of calls from
01:06
contractors
01:06
toward usually towards the end of the
01:08
day i was just going to ask you what
01:09
time of day do you get those calls greg
01:11
i mean it's all times of the days let's
01:13
be honest
01:14
i mean it seems the majority of them
01:16
during heating season come in the end of
01:18
the day they just got done with a tr
01:20
uh with a replacement or trying to get
01:23
the heat going yeah trying to get the
01:24
heat on
01:25
and they throw the switch the homeowners
01:28
standing there
01:29
and things don't go the way they're
01:31
supposed to lights go out
01:32
and literally the heat is on yeah
01:36
well the heat's on for them not for the
01:38
customers right that's right
01:39
well we've both been there boy that
01:41
reminds me of a call i had last week
01:43
yeah there's a contractor out in
01:45
minnesota he had
01:46
one of our zone valve relays evr boards
01:49
sure
01:50
and he was using our valves and they
01:51
were new valves new board
01:53
um and he was calling me to confirm that
01:56
our board had shorted out and he needed
01:58
to run to the supply house and pick up a
02:00
warranty board
02:02
and get that replaced so before i just
02:05
gave him the nod and okay to
02:07
run off and do that i started asking
02:09
them some questions and
02:10
pushing them through some steps and he
02:14
tried resetting the power
02:15
and the board wouldn't come back on so i
02:17
had him
02:19
you know initially disconnect all his
02:20
thermostats and disconnect all his zone
02:22
valve wiring so it was just a plain
02:24
board
02:25
no low voltage wires connected and i had
02:27
him reset the power and lo and behold
02:29
the board came
02:29
on the power light was on board was
02:32
working
02:33
imagine that yeah and that's that's what
02:35
we got to start off with right
02:36
we gotta eliminate the problem you know
02:39
we want to be able to verify that
02:40
it's the board or it's something outside
02:42
the board yeah so long story short with
02:44
that and we'll get into the
02:45
troubleshooting side
02:47
as we started jumping out and testing
02:49
the board
02:50
and found out the board was working well
02:52
we started to
02:53
reconnect the thermostats and all of
02:56
them work
02:57
they called for heat lights came on
02:59
started reconnecting the zone valves we
03:01
got to the third zone and he reconnected
03:03
that valve and tested it and boom the
03:05
board went out
03:07
you know which then immediately he
03:09
looked at the zone valve
03:10
oh i must have a bad relay or a bad
03:12
actuator sure
03:13
it's a brand new clefty actuator plugged
03:15
in there oh boy
03:17
so had him go down disconnect the
03:20
the actuator um and ohm his wire out and
03:23
he had to short it
03:24
low voltage wire wow imagine that well
03:27
this
03:27
and this valve was located away from the
03:30
control and had an existing low voltage
03:33
wire in place so he had used an existing
03:35
wire
03:36
only to find out that there was a short
03:38
in the existing low voltage wire
03:39
right and we find that a lot especially
03:42
in change outs where either they never
03:44
had a panel
03:45
or they did a complete boiler upgrade
03:48
but
03:48
you know they've always had zone valves
03:50
and remote locations in the past and
03:52
right let's be honest we're going to
03:53
reuse the wiring if you can
03:55
yeah i mean you're trying to save time
03:57
and save time which saves cost and
04:00
you know you already have a zone valve
04:01
so you replaced it you put a new zone
04:03
valve in you put a new relay control in
04:06
but boy you know to string a new wire
04:07
and you know maybe you have to fish
04:10
a wire somewhere it's not that easy so
04:12
you know
04:13
it's just a wire yeah why wouldn't i
04:15
reuse it sure why not
04:17
you wouldn't think that would be a
04:18
problem but it's an older home maybe it
04:21
got rodent damaged
04:22
who knows i mean anything can happen all
04:24
i know is in talking to him he was
04:26
pretty excited because
04:28
he was ready to jump in his truck and
04:29
run to the supply house and get a new
04:31
board and come back
04:32
and rewire the entire board pull the old
04:35
one out put the new one in and he
04:38
hit the switch started powering on the
04:40
thermostats and had the same problem
04:42
and we've had them calls oh yeah i'm on
04:44
my third board and it's still doing the
04:46
same thing well guess what
04:47
you know what it probably isn't the
04:49
board you know i mean weird things
04:51
happen
04:51
but i doubt it's the board so then you
04:54
did the right thing
04:55
you walked them through isolating
04:56
everything off and kind of starting from
04:58
scratch and going one component at a
05:00
time
05:01
you think about it in the time it would
05:02
have taken him to get in his van drive
05:05
to the parts store
05:06
or to the supply house get a new board
05:09
he he ran a new wire and everything
05:12
worked and he was done
05:13
yeah looked like the hero all done and
05:16
he was running
05:17
right and builds confidence with your
05:19
customer certainly does
05:21
so zvr boards the valve boards a lot
05:24
more
05:24
things going on there with thermostats
05:27
the pumps and switches and switches and
05:30
the valves themselves
05:31
right right when we go from there to a
05:33
zsr
05:34
the pump relay a lot more simplistic
05:37
yeah a lot simpler on the low voltage
05:39
side
05:39
yeah it's thermostats that's right right
05:42
yeah it's
05:43
pretty easy sure yeah with that board
05:46
you're just bringing power in
05:48
um one thing nice about our boards
05:50
whether it's a zvr or zsr
05:52
board is that it has a transformer so
05:55
the zsr is going to be built onto the
05:58
board it's going to be soldered onto the
05:59
board
06:00
where the zvr is going to be exterior
06:02
mounted in the cabinet
06:04
and it plugs in with a four prong molex
06:06
plug into the board
06:09
yeah that's exactly it and the nice part
06:12
about the zvr too
06:13
is say you have multiple zones
06:17
where you have multiple actuators
06:20
getting wired into one zone
06:22
you can add some uh some expansion
06:25
yeah by by installing that expansion
06:27
transformer and plugging it into
06:29
the factory setup of uh molex plugs
06:32
there
06:33
right yeah you can take it from the
06:34
standard 4d v8
06:36
transformer zvr 103 and 104 right
06:39
yep to the 80va yeah and the zvr 106
06:43
comes with 80va where the transform it
06:45
comes with two of them
06:46
ready to go right but you know you you
06:48
get into
06:49
you know some of competitors you know
06:51
actuators where they have a real high va
06:53
draw
06:54
for opening um if you have those on a
06:57
three or four zone panel with a 40v8
06:59
transformer you can easily add that
07:00
expansion to get adva
07:03
and power those higher higher va
07:05
transformer or
07:06
actuators sure so
07:09
kind of getting back into some of the
07:11
troubleshooting um
07:13
maybe we slow it down a little bit and
07:14
kind of pick that apart yeah i think we
07:16
should
07:17
so number one i think you want to locate
07:20
the cause of the power loss right
07:23
that's really what we had to do sounds
07:24
easy yeah it sounds easy it sounds real
07:26
easy
07:27
but by isolating everything off
07:29
thermostats
07:31
zone valves then you're plugging one
07:33
component in at a time
07:35
however you want to do that you can go
07:37
one thermostat one zone valve so start
07:39
with zone one
07:40
and start plugging them in make the call
07:42
for heat right if everything kicks on
07:44
pump runs all that works well without
07:47
overheating that that mov
07:49
in there um we know the dead zone's fine
07:52
right so then we continue that process
07:54
keep on going down the line until
07:56
you have one that trips that thing out
07:59
yeah well and that's an easy way
08:01
to you know quickly find out what is
08:04
causing the problem
08:06
but if you're convinced it's the board
08:07
that's causing the problem one nice
08:09
thing
08:09
i like to do you know once i get
08:11
everything disconnected i'd like to
08:13
you know i mean ideally i'd like you to
08:16
have a meter
08:17
and go through and check for your
08:18
voltages at your thermostats check your
08:20
pumps
08:21
um check your actuators you know your
08:25
motor terminals for your actuators for
08:27
voltage
08:28
but you can make a simple jumper wire
08:31
and
08:31
run the board through its paces jump out
08:33
the r w at the thermostat see if the
08:35
light comes on and it calls
08:37
on a pump relay see if you get 120 volts
08:39
at those pump terminals
08:41
right you got a valve relay look for 24
08:43
volts at the pump
08:44
at the motor terminals at the motor
08:46
terminals and then
08:48
in order to verify that that part works
08:51
i mean typically you're gonna see a
08:53
light on only when
08:55
the end switch is made right so you need
08:58
an end switch
08:59
or a jumper wire to jump out the end
09:01
switch terminals
09:02
of the board just to verify and then you
09:05
know it'll close the xx terminals for
09:07
the boiler
09:09
because that's just a dry to contact
09:10
right and then it'll also send 120 volts
09:13
to the system
09:14
pump right yeah and then that's one
09:17
thing
09:17
important to remember is that you know
09:19
for you guys who use two-wire zone
09:21
valves
09:22
you can use them with our boards but you
09:24
may notice that
09:26
okay thermostat light came on my zone
09:28
valve powered open but boy my pumps or
09:30
my end switch aren't coming on
09:32
yeah i'm sorry pumps or um pump yeah or
09:34
end switch
09:35
which light is not coming right yep yeah
09:38
and then you don't get
09:39
a end switch closure on xx in the upper
09:42
upper right hand corner left hand corner
09:45
there and you don't
09:46
get uh pumps energized right and you
09:49
what you won't
09:50
until it sees the end switch closed so
09:52
that you know it's set up to where
09:54
your thermostat needs to call and the
09:56
end switch for the actuator needs to
09:58
close
09:59
before that board will turn the boiler
10:00
or pumps on so if you have that two-wire
10:02
actuator
10:03
it's important to make sure you put a
10:05
jumper in at your end switch terminals
10:07
so that
10:08
that board will go into the next step
10:10
well i think the biggest thing to
10:11
remember is that we have that resettable
10:13
link to protect that transformer so
10:16
you know if you if if you see that go
10:18
out and you reset the power to the board
10:20
and you see it doesn't come back on it's
10:23
kind of time to rewind
10:24
yeah it is i agree and that's that's a
10:27
resettable fuse
10:29
well let's rewind a little bit let's
10:31
kind of go back and talk about
10:33
the troubleshooting maybe we can kind of
10:34
touch on the specifics of the
10:36
of these boards yeah that's a great idea
10:38
why don't we start with the zvr series
10:40
that's the
10:41
the board that i just talked about from
10:43
the tech call i shared
10:45
right that's perfect you know we offer
10:47
three different
10:48
models of the zvr a three zone the zvr
10:51
103
10:52
yeah a four zone the zvr 104
10:55
and a six zone the zvr 106. so that's
10:58
going to take care of
10:59
anything with zone actuators or zone
11:02
valves
11:02
right yeah and we're not going to talk a
11:04
lot about the details we're going to
11:06
spend a lot of time talking about
11:07
troubleshooting but
11:08
just for knowledge those boards can be
11:10
all connected together to
11:12
you know allow many boards to be added
11:14
or
11:15
unlimited amount of zones yeah so
11:19
but yeah when you look at those boards
11:21
what's nice is that you know they have a
11:23
transformer provided with them
11:24
so for a zone valve relay board your
11:27
your
11:28
valve actuators are going to be all
11:30
powered on low voltage 24 volts so it
11:32
has
11:33
the transformer with it and
11:36
actually that transformer is externally
11:38
mounted in the cabinet
11:39
it's not soldered onto the board it
11:41
plugs in with the four prong molex plug
11:43
right so the zvr 103 and zvr 104 come
11:47
with a singular
11:49
40va transformer and you have the
11:52
capability
11:54
of plugging in an additional 40 va
11:56
transformer for
11:57
those systems that have multiple
11:58
actuators where maybe a 40 va
12:00
transformer isn't enough power to do it
12:02
yeah it's nice we have a big cabinet
12:04
that that board is enclosed in it'll
12:06
allow space to
12:08
put that second transformer if you need
12:10
that absolutely so you can
12:11
put 80 va where the transformer where
12:14
the zvr 106
12:15
automatically comes with two 40 va
12:17
transformers that you plug in when you
12:19
get it installed
12:20
and and they're ready to go with 80 vh
12:23
of transformers right
12:24
yeah so you'll get you'll get power for
12:26
your thermostats um
12:27
or your zone valves right from the
12:29
onboard transformer so all you really
12:31
need to do for a power source is bring
12:32
120 volts into that board
12:34
right you know from there you know it's
12:37
great
12:38
you know we have thermostat terminals
12:40
for each of the zones
12:41
at the thermostat terminals you know you
12:44
have your
12:45
your r and your w terminal and you also
12:47
have your c your common terminal for
12:49
those power robbing or or smart
12:51
thermostats so you can power those right
12:52
off the board
12:54
directly below them at the same zone
12:56
location you're going to have
12:57
a location to wire in your zone valves
12:59
you're going to have two motor terminals
13:01
and two switch terminals for end switch
13:04
right
13:04
and that end switch has got to be wired
13:06
right definitely has to be wired
13:09
yep it's looking for that end switch to
13:12
close
13:12
for that board to go into the next step
13:14
of its of its operation
13:16
right which would be energizing the xx
13:19
terminal to bring on the boiler
13:21
and then also powering the the pumps
13:23
through the relay
13:24
right so when you look at wiring you
13:26
guys are going to find it they're pretty
13:27
simple to wire
13:28
thermostat ties into the zone thermostat
13:30
location
13:31
the corresponding valve ties into the
13:33
valve location
13:35
you'll do that for zones one two three
13:38
or all the way through six or as many
13:39
zones as you have right
13:41
and the only time it really gets muddy i
13:43
think is when you got
13:45
somebody trying to wire in like an old
13:46
taco 570 series that three wire
13:49
that sucks a lot of juice um or one of
13:52
the weird
13:53
like white rogers four wires sure that
13:56
get wired totally different and
13:57
if you ever need help with wiring those
14:00
please call us
14:01
call call in and we'll we'll get you
14:03
through it yeah we i mean
14:04
i know we have some wiring diagrams in
14:06
our wiring guide that show how to tie
14:08
those in but we're always here as well
14:10
um so one nice feature as well is that
14:13
you'll be able to tie in
14:14
a system pump a secondary pump or a zone
14:17
one pump
14:18
right into that board the zone one pump
14:20
would be used if you're setting up a
14:21
priority it gives you the ability to
14:24
to control up zone one as a pump versus
14:26
a valve in a priority application maybe
14:29
for domestic hot water
14:30
right provided you install the jumper in
14:33
the end switch
14:34
exactly yep that's for sure we get that
14:36
an awful lot and
14:37
they get everything down to the wire and
14:40
everything's working but that
14:41
yeah well i don't have a i don't have an
14:43
actuator on that it's just the pump
14:45
okay all you need to do is slide that
14:46
inside that piece
14:48
two wire in there a single wire in there
14:50
and it
14:51
works right yep and then it'll give you
14:54
you know your end switch to turn your
14:56
boiler on it gives you an auxiliary
14:58
relay
14:59
and a zone one end switch for like your
15:01
modulating condensing boilers that might
15:03
have a separate end switch call for
15:04
domestic water that's right
15:07
but when you look at troubleshooting and
15:08
that's what we're going to focus on
15:10
today
15:10
you know that board has a built-in
15:14
uh resettable link that protects that
15:16
transformer protects the low voltage
15:18
side
15:19
provided you don't put too much juice
15:21
through it
15:22
yeah yeah that's for sure i've seen
15:25
those
15:26
i've seen those get cooked before yeah
15:27
they do get cooked and
15:29
you wonder what they did to uh to fry
15:31
them but it has to be a pretty bad
15:32
short yeah um but so but that's exactly
15:36
what it's there for
15:36
it's to protect the board in the event
15:38
of a short so
15:40
you know you guys i shared that call
15:41
about the contractor
15:43
on site in minnesota having that board
15:45
short out
15:46
let's talk a little bit more about
15:48
troubleshooting so let's say you get it
15:49
connected you wire it up and you have
15:51
that
15:52
that resettable link go out and take the
15:54
transformer out what do you do then
15:56
well i think i'm i'm going to start off
15:58
with
15:59
isolating all the low voltage
16:02
components right off the board i'm
16:04
taking the thermostats off
16:06
and i'm taking the actuators off and
16:09
probably unwiring
16:10
the end switches because i mean it's
16:12
another rabbit hole we can jump down
16:14
we've had it where guys have wired the
16:15
end switch to the motor and then pin
16:17
that pin that thing
16:18
open which closes the switch and that's
16:22
a direct short right
16:23
right we've seen that happen too but but
16:26
for all practical purposes
16:28
we're going to isolate all the
16:29
components off and then i'm going to
16:31
start with plugging the transformer in
16:33
turning it on making sure the light
16:35
comes on nothing funny is happening okay
16:37
i'm going to wire well that's the big
16:39
key you know once once you get all your
16:41
low voltage wiring pulled off the board
16:43
and guys always i can almost hear them
16:45
cringe on the other end of the phone
16:46
when i tell them okay well
16:48
you know leave the power off to the
16:49
board and disconnect all your low
16:50
voltage wires it's like
16:52
you know much time i spent wiring this
16:53
board now you want me to disconnect
16:55
everything we need to do it you do
16:57
because you have so many different
16:59
avenues of where that short could be
17:01
right so like greg said and then reset
17:03
the power to it and if your
17:04
green power light comes on okay that's a
17:07
good sign
17:08
yeah then you start adding your your
17:10
pieces of
17:11
of the puzzle back together wire that
17:13
thermostat in
17:14
make sure the call for heat comes on
17:16
wire the motor wire the end switch make
17:18
sure that all comes on
17:20
if that's all good you move on move on
17:23
to the next zone
17:24
and continue to do the same thing you
17:26
know thermostat
17:27
light comes on for zone two you plug the
17:29
motor in
17:31
for the the zone valve and all of a
17:33
sudden the light goes off
17:35
all right what do we have going on
17:37
that's exactly what i had with that
17:38
contractor in minnesota do we have a
17:40
shorted wire
17:41
do we have a miswired zone valve far
17:43
away that we don't know about
17:45
because something is wrong there but you
17:48
know it's short
17:49
yeah you know i get that question a lot
17:50
with guys using thermoelectric
17:53
actuators yeah you know especially you
17:55
know not
17:56
not our brand but you know there's a lot
17:58
of different brands out there
18:00
but i'll get calls from contractors with
18:01
different brands and you know they give
18:03
you four color wires
18:05
yeah okay well what what two are the end
18:07
switch and what two are the motor
18:08
yeah is it is it yellow and red i mean
18:11
right well i bet i've had guys wire them
18:14
wrong where they wire the end switch to
18:15
the motor terminals and the motor
18:17
terminals
18:18
to the on switch and then the board
18:20
doesn't do any and then it doesn't do
18:21
anything but it doesn't short the board
18:23
out either no because that actuator is
18:25
is right now closed and the switch is
18:28
open so it just sits there
18:29
right right so you know then you know
18:33
i find myself a lot of times then
18:34
exploring the other manufacturer's zone
18:37
valve and helping them
18:38
right which is part of what we do help
18:40
you figure out which wires are actually
18:41
the end switch because
18:43
when we get off the tech call we want
18:44
you we want that board working
18:46
absolutely yeah so it really boils down
18:50
to
18:51
isolating the individual components out
18:53
and
18:54
going through it one step at a time now
18:56
you can test this with a meter too
18:58
i mean that's honestly if you want to
19:01
get good with your meter
19:02
learn how things how voltage travels
19:05
when everything is working
19:07
you know test between r and w on a call
19:09
for heat
19:10
you're not going to read 24 volts
19:12
because it's a closed circuit right
19:14
you go between r and common no matter
19:17
what you should read
19:18
voltage what about w and common great w
19:20
and common on a call for heat
19:22
you just completed the circuit so now
19:24
you're going to read
19:25
your low voltage 24 to 28 volts right
19:27
what about on
19:28
call that's on a no call for heat no
19:31
call for heat w to common
19:32
you should read zero volts yep
19:34
absolutely
19:36
all right it's a good way to test if
19:38
your thermostat is actually calling
19:39
yeah because i've had guys that have
19:41
done that well i just turned my
19:42
thermostat to heat and it's not calling
19:44
well a lot of the thermostats will have
19:47
um
19:48
delays built into they do so if you turn
19:51
your thermostat
19:52
on and you go back to your board and
19:53
it's not calling and you check between
19:55
r and c and you have 24 volts and you're
19:57
checking w to see and you don't
20:00
well that tells you that thermostat's
20:02
not completing the circuit to tell that
20:03
board to come on so you either have to
20:05
wait through
20:06
the delay um or find out what's going on
20:08
in the thermostat that didn't complete
20:10
that
20:10
yeah maybe the wire's not hooked up or
20:12
thermostat's in a delay or
20:14
sure who knows what right there's so
20:16
many different ways it could be
20:18
yeah and that's what makes us daunting
20:20
yeah well the
20:21
yeah it is and you know that's where
20:25
trying to determine is it a thermostat
20:27
issue is it an actuator issue is it a
20:30
board issue is it a piece of wire
20:31
sure i've seen new thermostat wire come
20:34
off the roll and be shorted internally
20:36
yeah and honestly i there's one
20:39
manufacturer
20:40
maybe a couple of them out there of
20:41
thermostat wire like they have that
20:43
strip string and if you pull hard on
20:45
that strip string and all of a sudden it
20:46
binds
20:47
guess what you're doing in there you're
20:49
actually skinning the wire off
20:51
and i had some not long ago where i did
20:53
that
20:54
and i stripped it all the way down i
20:56
think i stripped it about two feet in
20:57
and here three of the wires had been
20:59
skinned and if i would have applied any
21:01
power they would have shorted
21:02
right so just kind of let that be a
21:05
lesson to you
21:05
it doesn't take much no no it certainly
21:08
doesn't
21:09
so i think we've covered the the zvr
21:12
pretty well
21:12
we also have the zsr the pump panel out
21:15
there
21:15
right yeah that that board is designed
21:18
for
21:19
separating zoning with pumps right
21:22
thermostats and pumps yep thermostats
21:23
and pumps there's no valves there's
21:25
nothing extra in there and that one's
21:26
pretty simple really it is pretty simple
21:28
i mean we do have three different
21:30
transformer sizes depending
21:32
on what size boards you have you know
21:34
that comes in the three the four
21:36
or the six zone option but then we also
21:38
have a smaller single zone option for a
21:40
single pump switching really
21:41
yeah so we have the zsr 101 single zone
21:46
the zsr 103 three zone and zsr104
21:50
a four zone and a zsr 106
21:54
six zone correct yep and all three of
21:57
those will have different
21:58
well three and three of those will have
22:00
different transformer sizes
22:01
sure yeah so those transformers are
22:04
going to be soldered into the board
22:06
um they're not externally mounted and
22:08
plugged in like the zvr
22:10
series so uh those are soldered directly
22:12
onto the board but they still have that
22:14
resettable link
22:15
protection like like the other board has
22:18
right so if you have a quick little
22:19
short
22:20
it'll open up lights will go off it
22:23
basically go through and do the same
22:24
thing right isolate your thermostats off
22:27
that's the only low voltage
22:29
yeah cause that link is really only
22:31
protecting you on your low voltage side
22:33
right it's so it's gonna open up when
22:36
there's a low voltage short
22:38
and then from there you disconnect power
22:40
disconnect all your thermostats
22:42
repower it up if the green light comes
22:44
on you have power you know the board's
22:46
still okay so yeah so then you're gonna
22:48
go back
22:49
and plug in your thermostats
22:53
one at a time and see what happens right
22:56
now
22:56
yeah sooner or later you're going to
22:57
find that issue you are
23:00
and if one is giving you one in
23:02
particular has given you fits
23:04
then that is where you break out the
23:06
ohmmeter and start testing for
23:07
continuity
23:08
between your wires your thermostatic
23:11
wires and your thermostat wires
23:13
yep and most of the time we see a
23:15
problem on on three wire
23:17
not too often on on two wire but it it
23:19
could happen
23:20
you know if you got say the r or the w
23:22
wire
23:23
you notice the thermostat works fine
23:25
until you make a call for heat
23:27
and then all of a sudden the board goes
23:29
out chances are that short
23:31
might be in that w wire somewhere and
23:33
that could
23:34
i mean if you're not running a common to
23:36
your thermostat and you're only running
23:37
a two-wire
23:38
that could be a reason why your board's
23:40
not shutting off
23:42
yes if you haven't you have that wire
23:44
stripped inside the
23:45
the cabling you know that's giving you a
23:47
constant call for heat so if you get to
23:49
a point where
23:50
hey you know what i only have a two wire
23:52
thermostat
23:54
i don't even have the thermostat on the
23:55
wall i have the wire separated up at the
23:57
wall
23:57
and my board is continuing to call for
23:59
heat well that's a pretty good sign that
24:02
you know your wiring there's something
24:04
shorted in the
24:05
in the wiring yeah there it's scanned
24:08
apart and it's touching
24:09
the thing is that's not going to take
24:10
the board out it's not going to take
24:12
that resettable link out because it's
24:14
not as short
24:15
right it's just going to give you a
24:16
continuous call for heat
24:18
exactly and then when you get to the
24:20
high voltage side of that board we have
24:22
protection there as well
24:24
yeah in the in all the zsr boards
24:27
they all have a pump fuse that's
24:29
replaceable
24:30
right yep and we include a couple extra
24:33
fuses
24:33
with the board so you'll have a couple
24:35
extra in the cabinet sure
24:36
um but yeah fuse protection for each of
24:39
the pumps
24:40
and the system pump right and those are
24:42
good up to five amps
24:43
right yeah so that should cover any of
24:46
your
24:47
your modern pumps yeah i would say so
24:50
well greg i think we did a pretty good
24:51
job of covering both products series
24:53
and the troubleshooting side um so i'm
24:56
looking forward to coming back next week
24:57
what are we going to talk about
24:58
yeah so tune in next week to episode 10
25:01
and uh
25:03
basically we're going to go over what
25:04
you need to know about skull protection
25:06
yeah
25:06
go back to a plumbing topic i like that
25:08
sounds like a plan
25:10
great we'll see you guys next week see
25:11
you next week
25:14
thank you for tuning in if you ever need
25:16
help
25:17
please feel free to contact our tech
25:18
support team anytime
25:20
at techsupport.us caleffi.com
25:24
or call us during our business hours at
25:27
7
25:28
30 a.m to 4 30 p.m central time
25:32
at 414-238-2360
25:43
[Music]