3
4. ELECTRICAL WIRING
All electrical wiring to the boiler must be electrically bonded to ground in accordance with the
requirements of the authority having jurisdiction or, in the absence of such requirements, with
the National Electrical Code, ANSI/NFPA 70 or the Canadian Electrical Code Part I, CSA C22.1,
Electrical Code.
Provide disconnecting means of sufficient rating within sight of the boiler. These heaters require
an 115-V 60-hz supply. Depending on the pump used, a 15-amp breaker is usually sufficient.
Electrical connections must be made so that the circulator will operate before the gas valve can
open. At no time may the control system allow the burner to fire without water flowing in the
system.
Use minimum 18-gauge conductor for 24-volt field wiring to boiler. Splicing of wires is not
recommended.
Use sealed tight conduit suitable for outdoor use for outdoor installations.
For low water cutoff and remote controller, use terminal strip provided inside control panel.
Refer to wiring diagram provided with boiler.
5. GAS SUPPLY AND PIPING
This boiler is intended to operate at inlet gas pressures not exceeding ½ psi (14” water
column). If higher pressures are present, consult the gas company for correction.
When pressure testing the gas supply piping at pressures above ½ psi, the boiler and its
individual gas shut-off valve must be disconnected from the supply piping.
Provide a trap (drip leg) as close to the heater as possible.
Install a good joint union and manual shut-off valve in the gas line near the heater to allow easy
removal of the gas control assembly.
Provide gas pressures at inlet to boiler gas train as follows:
PROPANE
NATURAL
GAS
Minimum (inches water column)
11
5
Maximum ( inches water column)
11
7
The gas supply line must be of adequate size to prevent undue pressure drop and must never
be smaller than the size of the connection on the heater. Sizing based on Table 1 is
recommended.
Before operating the boiler, the complete gas train and all connections must be tested using
soap solution.
Summary of Contents for BLUE-FLAME Series
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