SPECIFICATIONS
ELECTRICAL RATINGS [@ 77°F (25°C)]: Input Voltage: 25 VAC 50/60 Hz
Max. Input Current @ 25 VAC: 0.45 amp Relay Load Ratings:
Valve Relay: 1.5 amp @ 25 VAC 50/60 Hz 0.6 pf
Ignitor Relay: 6.0 amp @ 120 VAC 50/60 Hz (resistive)
Inducer Relay: 2.2
Circulator Relay: 14.5
Flame Current Requirements:
Minimum current to insure flame detection: 1 µa DC*
Maximum current for
Maximum allowable leakage resistance: 100 M ohms *Measured with a DC microammeter in the flame probe lead
OPERATING TEMPERATURE RANGE:
HUMIDITY RANGE:
5% to 93% relative humidity
MOUNTING:
Surface mount multipoise |
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Timing Specs: (@ 60 Hz**) | maximum |
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Flame Establishing Time: | 0.8 sec |
Flame Failure Response Time: | 2.0 sec |
**At 50 Hz, all timing specifications should be increased by 20%
Gases Approved: Natural, Manufactured, Mixed, Liqui- fied Petroleum, and LP Gas Air Mixtures are all approved for use.
TIMING SPECIFICATIONS
(All times are in seconds, unless noted otherwise
| |
15 | |
Initial Ignitor | 7 |
(1st 64 attempts) |
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Minimum Ignitor | 5 |
Maximum Ignitor | 9 |
Ignition Activation Period | 2 |
Trial for Ignition Period | 4 |
Retries | 2 times |
Valve Sequence Period | 12 |
Interpurge | 30 |
15 | |
Lockout Time | 300 |
Heat | 30 |
Heat | 90/120/150/180 |
Cool | 5 |
Cool | 45 |
Auto Reset | 60 minutes |
Humidifier | Yes |
Electronic Air Cleaner | Yes |
*These times will vary depending on option switch position. See OPERATION section for further information
INSTALLATION
MOUNTING AND WIRING
All wiring should be installed according to local and na- tional electrical codes and ordinances.
The control must be secured to an area that will experience a minimum of vibration and remain below the maximum ambient temperature rating of 175°F. The control is ap- proved for minimum ambient temperatures of
Any orientation is acceptable.
Refer to the wiring diagram and wiring table when connect- ing the 50A55 control to other components of the system.
UL approved, 105°C rated 18 gauge, stranded, 2/64” thick insulation wire is recommended for all low voltage safety circuit connections. Refer to 50A55 specification sheet for recommended terminals to mate with those on the control.
UL approved 105°C rated 16 gauge min., stranded, 4/64” thick insulation wire is recommended for all line voltage connections. Refer to 50A55 specification sheet for rec- ommended terminals to mate with those on the control.
After installation or replacement, follow appliance manu- facturer’s recommended installation or service instructions to ensure proper operation.
The 50A55 has only one serviceable
!CAUTION
Do not short out terminals on gas valve or primary control. Short or incorrect wiring may damage the thermostat.
!WARNING
FIRE HAZARD
•Do not exceed the specified voltage.
•Replace existing control with exact model and dash number.
•Protect the control from direct contact with water
(dripping, spraying, rain, etc.).
•If the control has been in direct contact with water, replace the control.
•Label all wires before disconnection when servic- ing controls.Wiring errors can cause improper and dangerous operation.
•Route and secure wiring away from flame.
SHOCK HAZARD
•Disconnect electric power before servicing.
•Ensure proper earth grounding of appliance.
•Ensure proper connection of line neutral and line hot wires.
EXPLOSION HAZARD
•Shut off main gas to appliance until installation is complete.
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