Install Instructions

CG i GAS-FIRED wATER eotLER- sERIEs 3- Boiler Manual
9 b Operation - wiring diagrams
Figure 31 Schematic wtr ln g diagram
lA CAUTlON !
DO NOT connect directly from 3-wlre zone valves to the T- T terminals on the boiler.
When using 3--..ire zone valves. instal an isola ~o n relay. Connect the zone va lve end switch
wires to the Isolation relay coil. Connect the Isol ation relay coo tact across the boiler T-T
termina l s. Failure to comp ly can resullln damage to boiler components or cause un re li ab le
operation, resuhlng In possib le severe property damage.
NOTICE
• The con trol modu le Is polarity-sensi tive to the Incoming 120 VAC power . If polarity is reversed ,
contro l wil flash the POWER light when powered and wil not cycte boile r,
• A ll contacts shown without power app l ied .
• Connector and status l ig ht locations/orientations may vary.
I NDUCER MOTOR
CIRCULATOR
e Neutr al e Gnd
I
I
FI ELD
WI RING
*Item s not provided
59374b
*OUTDOOR
T EMPERATURE
SENSOR
(if used)
Part Nu mber 550-142-780/0712
[IIJ
Te rm inal bloct
(See ToableGt
For CGi -4 only
*
39