Weil-McLain CGi Series 3 Installation And Maintenance Manual page 40

CG i
GAS-FIRED wATER BOILER- sERIEs a -
Boiler Manual
9
b
Operation - wiring diagrams
(continued>
Figure 32 Ladder wiring diagram
40
lA
WARNlNG!
Electricol shock huard- can
cause severe injury or death.
Disconnect power before instaling
or servicing.
Legend for ladder wiring diagram
120 VAC field wiring
Low voltage lieid wiring
120 VAC fadory wiring
Low
voltage
&actory wiring
H 9l
voltage spark ignition wiring
Ground coooectors
T1bl e G:
Gl.$
valve termin1b and
anti~ipator
tetting:s
Gas valve
" A.
·e" ·c·
Mll!C'*«
....
Honeywel VR8204
MVIPV MV
PV
0.6
Hoocywcl VR8304
MVIPV
MV
PV
0.8
White-Rodgers S6E 2
3
OM
WMo-Aodgo<'$ 36C
~
•
3
• T erminals 2-4 are factorrjumpered on the
White-Rodgers 36C gM valve.
1. All wiring must be installed in accordance with:
0.7
A. U.S.A.-N.E.C . And any other national, state, or
lo-
cal code requirements.
a.
Canada- C .S.A. C22,1
c.e.c.
Part1 and any other
national, provincial, or local code requirements.
2. Pilot lead wires are not field replaceable . Replace pilot
assembly if necessary.
3.11
any of the original wire as supplied with the appli-
ance
must be replaced, use
minimum 105
•c
wire or equivalent, Exception-
wires to a rollout TFE must be 200
•c
or equivalent
4.
Thermostat anticipator setting (single zone)
- see
T able G for anticipator setting.
depending on which gas valve is instaled in boiler.
5. For muhiple zoning, use either zone valves or
circulators, Refer to the component manufacturer's II>'
structions and this manual for application and wiring
suggestions.
6. Refer to control component instructions packed with
tile boiler for application information.
7, Wire any additional limit controls (low water cut-<JH,
additional high limit. etc.) in
series with boiler rollout TFE and spil switch as
shown.
Q Hot
11
1<-- - - - - -120VAC--------< ..
'\ SERV!Cf
SWITCH
Neutral G nd
i
*
HIGH
VOLT~
~-~·
..
LO ~
IGtiTION
ELECTRODE
D ) o O · R - <1
.__
__
_,
._ ____________
~ t~~;~,----~
II
24VAC
f---------<J ~Power
THERMOSTAT*
i-----:1.
a.--~· ~Tstat-Circ
<;"
:__!
* +- 0-HW-- (if- u - s e-od)"l
cf
BOILER SUPPLY IMI"""-1
TEMP. SENSOR
I
<f
' --1
ROLLOUT * Additional
m
limits (note
7)
~
,..
~Limh
*
Outdoor
i ""·"""- -1
T e mperature
J ,; ,
Sensor
(~
usedll-;....---1
11----~.-J..~: o ----1 ~Purge
AIR
PRESSURE
SWITCH
PILOT FLAME
SENSOR
r--.J~Fiame
.!
HIGH
VOLTAGE Control Module
PilOT G AS
VALVE
A
·c- \(
"A" -
·r.
MAIN v- G AS
VALVE
See Table G
Low Voltage Section
PILOT GAS
VALVE
-.11 .
"PV" v
"C"
593748
For CGi -4 only
Part Number 550-142-780/0712