D. Electrical Connections
WARNING: Open all disconnect switches and secure in that position before wiring unit. Failure to do so may result in personal injury or death from electrical shock.
WARNING: Controls must be protected from water. Do not allow water to drip on the ignition system.
NOTE: Before installing any wiring, check the unit rating plate for supply power rating.
All electrical connections and wiring must conform to the current edition of:ANSI/NFPA No. 70 National Electrical Code and applicable state and local codes.
Entry location for all
If optional disconnect is not furnished with heater, the field provided disconnect must be of the proper size and voltage. Refer to unit nameplate for minimum circuit ampacity and voltage. The disconnect must be installed in accordance with Article 430 of the current edition of ANSI/NFPA No. 70 National Electrical Code.
Check the supply voltage before energizing the unit. The maximum voltage variation unbalance must not exceed 2%.
NOTE: Should any original wire supplied with the heater have to be replaced, it must be replaced with wiring material having a temperature rating of at least 105° C.
E. Field Piping
All gas piping must be in accordance with the requirements outlined in the National Fuel Gas Code - ANSI Z223.1. It is required that a ground union be installed adjacent to the manifold for easy servicing. A drip leg and/or filter should be provided upstream of the unit’s inlet gas connection. A
The location of this valve must comply with all local codes. A 1/8 inch N.P.T. test gauge connection must be installed immediately upstream of the gas supply connection to the unit.
Refer to the heaters rating plate for determining the minimum gas supply pressure for obtaining the maximum gas capacity for which this heater is specified.
DANGER: Never use an open flame to detect gas leaks. Explosive conditions may exist which would result in personal injury or death.
WARNING: To avoid equipment damage or possible personal injury, do not connect gas piping to this unit until a supply line pressure/leak test has been completed. Connecting the unit before completing the pressure/leak test may damage the unit gas valve and result in a fire hazard.
The gas line should be supported so that no strain is placed on the unit. Pipe compounds, which are not soluble to liquid petroleum gases, should be used on threaded joints.
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 PSIG.
The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressure equal to or less than 1/2 PSIG.
Correctly sized piping must be run to the unit. Please note that gas line pressure must be as shown on rating plate when unit is operating at full input.
F.Field Wiring and Remote Control Installation
1. Connect the power lines to the line side of the main disconnect switch.
2. Mount and wire remote control panel, thermostats, temperature sensors, and any other field installed controls as indicated on the unit control wiring diagram.
3. Connect the wires to the appropriate field wiring terminals as indicated on the unit control wiring diagram.
4. If the optional
G.Locating Temperature Controls
The room or outdoor thermostats should be mounted where they will not be subjected to direct impact of the heated air or radiant heat from the sun. It is also recommended that thermostats, especially those with mercury bulb contacts, be mounted on a vibration free surface. Interior walls or the side of building columns away from the heater are usually the location best suited for mounting thermostats.
Controls with outdoor bulbs require that the outdoor bulb be shielded from direct radiation from the sun. Unit mounted sensors are factory located and mounted.
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