Frequently Asked Questions

Learn more about SRP heaters' configurations
  • UA/TA/LA/LT/AUX/ATX/ALTX/WTH/WTS/AM Manuals: pg 7
  • UAG Manual: pg 8
  • VS Manual: pg 17, 18
  • VSVH Manual: pg 20, 21
  • GR: 113" long
  • UA/TA/LA/LT/AUX/ATX/ALTX/WTH/WTS/AM Manuals: pg 7
  • UAG Manual: pg 8
  • GR: Baffle pre-installed
  • VS/VSVH Manual: no baffles
  • Minimum 10' for 40,000 - 100,000 BTU/h
  • Minimum 15' for 125,000 - 150,000 BTU/h
  • Minimum 20' for 175,000 - 220,000 BTU/h

Where to find more information?

Manuals

  • UA/TA: pg 21
  • AUX/ATX/AM/WTH/WTS/UAG: pg 20
  • ALTX: pg 22
  • LA/LT: pg 24
  • VS/VSVH: pg 18

Installation height depends on the heater input rate. Consult SRP Representatives for the specific heater input rate.

Learn more about venting
  • UA/TA/LA/LT/AUX/ATX/ALTX/WTH/WTS/AM/UAG heaters are considered a Category I appliance for vertical venting and a Category III appliance for horizontal venting.
  • VS/VSVH heaters are considered a Category III appliance.
  • UA/TA/LA/LT/AUX/ATX/ALTX/WTH/WTS/AM/UAG: maximum 30' exhaust** and maximum 30' fresh air intake duct length** - horizontal.
  • GR: maximum air vent/flue for either rate is 10 feet - horizontal.
  • VS/VSVH: Pump A - 4" - maximum 10'; 5" - maximum 50

                           Pump B - 6" - maximum 50'

Please note: For vertical venting follow B149 or NFPA 54 Category 1 vent codes

** Special Configurations - must reduce maximum vent length, please see the manual or consult your local SRP representative for more details.

Where to find more information?

Product manuals venting sections

1/4" per 10' away from the burner

Where to find more information?

Product manuals warning page

Please use SRP supplied vent terminal

Where to find more information?

Product manuals venting section

Learn more about gas conversion kits and supply gas pressure
  • UA/TA/LA/LT/AUX/ATX/ALTX/WTH/WTS/UAG/GR: NG 5"-14"WC; LPG 11.5"-14"WC
  • S: NG 6.5-14"WC; LPG 11"-14"WC
  • M/KMI: NG 6.5"-14"WC; LPG 12"-14"WC
  • AM: NG 5.3"-14"; LPG 11.8"-14"WC
  • VS: NG 5"-14"WC; LP 11"-14"WC
  • VSVH: NG 5"-14"

Where to find more information?

On rating label on heater burner, and in Product manuals

  • UA/TA/LA/LT/AUX/ATX/ALTX/WTH/WTS/UAG/GR/S/M/KMI heaters can all be converted from NG to LPG, or from LPG to NG. A gas valve conversion kit and an orifice kit will be required to convert the heater.
  • VS heaters can be converted from NG to LPG, or from LPG to NG. An orifice kit will be required to convert the heater.
  • AM heaters can be converted from NG to LPG, or from LPG to NG. An alternative gas valve and orifice kit will be required to convert the heater.
  • Series MA and Series Premier VSVH are only approved for use with NG and cannot be converted.

Please note: SRP heaters cannot be rate converted in the field. Consult your local SRP representative for more information.

Where to find more information?

Please contact our authorized distributor in your area and provide your heater model.

Learn more about clearances

Manuals

  •  AM/UAG: pg 9, 10
  •  UA/TA/LA/LT: pg 9, 10, 11
  •  AUX/ATX/ALTX: pg 8, 9, 10
  •  WTH/WTS: pg 8, 9, 10
  •  GR: pg 7, 8
  •  S: pg 10
  •  M/KMI: pg 9
  •  VS: pg 15, 16
  •  VSVH: pg 18, 19

Please note: Combustible materials are considered to be wood, compressed paper, plant fibers, plastics, Plexiglas or other materials capable of being ignited and burned. Such materials shall be considered combustible even though flameproofed, fire-retardant-treated or plastered.

Where to find more information?

Follow the clearance to combustibles chart in the products manuals.

Bottom Shields are approved for all burner sizes. The below clearance (dimension C in Clearance Tables) may be reduced by 25% when an approved Bottom Shield is used.

Reduced clearances downstream from the burner are approved for all configurations. Dimensions B, C, and D in the Clearance Tables can be reduced for locations 25’ (7.6 m) or more downstream from a burner, the maximum reduction is 50%.

Please note: The stated minimum clearance to combustibles represents a surface temperature of 90°F (50°C) above room temperature. Building materials with low heat tolerance (i.e. plastics, vinyl siding, canvas, tri-ply, etc.) may be subject to degradation at lower temperatures.

Where to find more information?

Follow the clearance to combustible pages in the product manuals

Maintain minimum clearance to combustibles from sprinkler systems, and make sure these devices are not overheated.

Learn more about thermostats
  • UA/LA/AUX/WTH/UAG/GR/S/M/KMI: single-stage thermostat (such as CE139 or CE053)
  • TA/LT/ATX/ALTX/WTS/MA: two-stage thermostat (such as CE138 or CE211)
  • AM: modulating thermostat (such as CE195)

Where to find more information?

Please contact our authorized distributor in your area and provide your heater model.

  • Single Stage: Connect the purple wire to W and the blue wire to R
  • Two-Stage: Connect purple wire to R, brown wire to W1, and yellow wire to W2

Please note: if your thermostat requires 24VAC power to operate, please add an additional wire to ground.

Yes, single-stage and two-stage SRP heaters are compatible with smart thermostats.

  • UA/TA/LA/LT/AUX/ATX/ALTX/WTH/WTS: up to 6 burners with use of relays (CE381 or CE380)
  • AM: up to 4 heaters with use of a multiplexer and relays (CE241 and CE242)
  • S/M/KMI: uses external 24VAC supply, Class 2 transformer required. The transformer size depends on the number of heaters controlled at the same time. Transformer size = no. of Heaters x 20VA

Where to find more information?

Please contact our authorized distributor in your area and provide your heater model.

Yes, remote sensors can be used. The thermostat chosen must be compatible with external sensors (such as CE211 thermostat with CE212 or CE213 sensors).

Where to find more information?

Please contact our authorized distributor in your area and provide your heater model.

Sequence of Operations

The burner will exhaust any contaminants in the combustion chamber before ignition begins.

The length of time that the ignitor will spark and the gas valve will remain open to establish flame.

The burner will exhaust any contaminants between trial for ignition time periods.

The burner will exhaust any flue gases from the system after the call for heat has ended. The post-purge will only occur when using a 24VAC or low-voltage thermostat.

Module Error Code
  • 1 x Flash: Airflow
  • 2 x Flash: Flame no call for heat
  • 3 x Flash: Ignition Failure
  • 4 x Flash: Control Fault (CNE only)
  • STEADY ON: Control Fault (FENWAL only)
  • 1 x Flash: Airflow
  • 2 x Flash: Flame no call for heat
  • 3 x Flash: Ignition Failure
  • 4 x Flash: Gas valve not electrically connected
  • STEADY ON: Control fault
  • 2 x Flash: Flame no call for heat
  • 3 x Flash: Ignition failure
  • 4 x Flash: Control fault
  • 2 x Flash: Flame no call for heat
  • 3 x Flash: Ignition failure
  • STEADY ON: Control fault
Other
  • Hang the chain at one of the 45° ears of the hanger. This will angle the reflectors at 45°
  • Make sure the burner head stays horizontal (0°).

Where to find more information?

Installation diagrams in product manuals

  • Most of the SRP heaters are certified to use without any change in Canada for 0 - 4,500 feet above sea level and 0-2000 feet In the U.S. above sea level. Anything over 2000 feet is de-rated by 4% per thousand feet above sea level as per the National Fuel Gas Code in the U.S.
  • If you require a de-ration kit, which includes an orifice and an air pressure switch, please contact our authorized distributor in your area and provide your heater model.