xFyre 300A, Installation & Operating Instructions Manual

Page: 19 / 60

Electrical Power Connections
Installations must follow these codes:
• National Electrical Code and any other national,
state, provincial or local codes or regulations hav-
ing jurisdiction.
• Safety wiring must be NEC Class 1.
• Heater must be electrically grounded as required
by the NEC.
• In Canada, CSA C22. 1 C.E.C. Part 1.
The XFyre 300A–850A heaters are wired for 120 VAC
single-phase 60 Hz power. Consult the wiring diagram
shipped with the heater. Before starting the heater,
check to ensure proper voltage to the heater and
pump(s). A larger circuit breaker may be needed for
pumps larger than 1/4 hp.
The boiler pump (up to 1 hp) and the indirect DHW
pump (up to ¼ hp) get their power supply directly from
the heater power supply (connections are located in
the rear wiring box). The system pump relay is rated
Natural Gas – 1,000 BTU/ft
3
, 0.60 specific gravity at 0.5 in. WC pressure drop
Propane Gas – 2,500 BTU/ft
3
, 1.53 specific gravity at 0.6 in. WC pressure drop
Table K: Maximum Equivalent Pipe Length
Model
No.
3/4” NPT 1” NPT 1-1/4” NPT 1-1/2” NPT 2” NPT
N P N P N P N P N P
300A 15 30 45 100 175 400 390
400A 30 70 120 275 270 414
500A 15 40 65 150 150 350
700A 42 96 96 220 310 795
850A 25 55 55 125 175 450
for pilot duty only. XFyre heaters may power up to 2
pumps directly. Install a circuit breaker sized sufficient-
ly for both the heater and the pump(s). An indirect
DHW pump larger than ¼ hp or 5A must use a sepa-
rate power supply and run the power through an
external field supplied pump contactor. Use appropri-
ately-sized wire as defined by NEC, CSA and/or local
codes. All primary wiring should be 125% of minimum
rating. The indirect and system pumps outputs are
fuse protected.
If any of the original wire as supplied with the heater
must be replaced, it must be replaced with 105°C wire
or its equivalent.
All 120VAC field wiring connections to the XFyre
heater are made inside the rear wiring box as shown
in Fig. 12. Low voltage wiring is connected to the
VERSA control board and the Platform Ignition Module
(PIM) at the front of the unit. Sensors, enable/disable
contacts, (optional) 0-10VDC control wiring, and cas-
cade connections are wired into the VERSA and PIM
field wiring plugs. See the wiring diagram on page 44.
19
Heater
Model No.
STANDARD PUMP MODELS
H7 - Boiler WH7 - Water Heater
Pump Model HP Amps Pump Model HP Amps
300A 0012 1/8 1.3 1611 1/4 5.7
400A 0012 1/8 1.3 1630 1/2 6.9
500A 1611 1/4 5.7 1630 1/2 6.9
700A 1630 1/2 6.9 1634 1 14
850A 1630 1/2 6.9 1634 1 14
Table L: Standard Pump Sizes and Amperages