Crown Boiler CWI207, CWI172, CWI345, CWI310, CWI103, CWI276, CWI Series IX Wiring, SingleZoneWiring

IX Wiring

WARNING

All wiring and grounding must be done in accordance with the authority having jurisdiction or, in the absence of such requirements, with the National Electrical Code (ANSI/NFPA 70).

SingleZoneWiring

1)120 Volt Wiring - The boiler should be provided with its own 15A branch circuit with fused disconnect. All 120 volt connections are made inside the L8148E or L8124E aquastat relay as follows (also see Figures 18-21):

•Hot (“black”) - Terminal “L1”

•Neutral (“white”) - Terminal “L2”

•Ground (“green” or bare) - Ground screw on case of L8148E or L8124E

2)Thermostat Wiring - Follow thermostat manufacturer instructions. To insure proper thermostat operation, avoid installation in areas of poor air circulation, hot spots (near any heat source or in direct sunlight), cold spots (outside walls, walls adjacent to unheated areas, locations subject to drafts). Provide Class II circuit between thermostat and boiler. Connect thermostat wire leads to terminals T and TV inside L8148E aquastat relay.

(NOTE 2)

2

N L

V8295A

GAS VALVE

(CWI310-379 ONLY)

V8295A

(CW I310 -379 ONLY)

L

N

2.VENT DAMPER REQUIRED ON ALL BOILERS EXCEPT CWI310 - CWI379. WHEN DAMPER IS NOT USED, DAMPER HARNESS IS REPLACED WITH JUMPER PLUG

FIGURE18: WIRINGDIAGRAM, STANDINGPILOTLESSTANKLESSHEATER

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