Hastings DIRECT GAS FIRED ELECTRIC STEAM, Инструкция по установке и обслуживанию

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9. If burner flame is not consistent across the entire burner length and darker areas are noticed, burner orifice openings
are blocked and require cleaning - contact factory for orifice drill size.
M. TROUBLE SHOOTING THE ELECTRIC SB UNIT
1. If blower fails to operate, check to see if:
a. Optional main disconnect switch or circuit breaker closed.
b. All main fuses (if disconnect switch used) are in line.
c. Control transformer is supplying 115 volts to control circuit.
d. Blower switch in remote control panel is “on” if unit used for make-up air, or in the “on” or “auto” position if unit is
being used for space heating or heating/ventilating.
NOTE: If blower switch is in “auto” position, blower will operate for approximately 90 seconds after switch is
turned off.
e. Blower start relay coil energized and contact closed.
f. Fan delay timer heating element energized and contacts closed.
g. Magnetic motor starter is in circuit (manual reset starter).
h. There are any loose wires or connections in blower circuit at either terminal block or control components.
Also check the following optional controls, if used to see if:
a. Damper motor and end switch is closed (damper motor must be full open).
b. Low limit temperature control setting too high or n.c. over-riding timer contacts open.
c. Access door switch(es) open.
NOTE: If other optional controls are supplied on special applications, check to see if they are in the electrical circuit.
2. If blower runs, but remote control panel blower light doesn’t come on, auxiliary starter contact in magnetic motor
starter not closing.
3. Units equipped with filter sections will have a clogged filter or blocked intake light in remote control panel.
4. If blower operates, but electric heater fails to operate, check to see if:
a. Season switch in remote control panel is in “winter” position.
b. Air proving switch is closed – check to see if:
1. Discharge is blocked
2. Belt(s) are loose and slipping.
3. Blower is running backwards.
4. Sensing tube is blocked or crimped.
c. Heating relay coil is energized and contacts closed.
d. Standard modulating step controller has power – check to see if:
1. Step controller power transformer fuses are in electrical circuit.
2. Power transformer supplying 115 volts.
3. Automatic reset thermal cutout is closed.
e. Step controller is functioning.
f. Any or all sub-circuiting heating element fuses in circuit.
g. Magnetic heating element contractor coils are energized and contacts are closed.
h. Thermally operated heat limiters are in power legs to heating elements.
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