Engineering Specs

4
(Test B methodology). The convection heat coefficient of the appliance will not be more than 55%
for inputs up to 50,000 Btuh.
3.04 Submissions - Proof of Performance
The project submission will include written results of the radiant coefficient testing of the complete
heater as produced by CSA International or other accredited certification test facility.
If the proposed radiant heater is unable to attain the minimum 45% radiant coefficient, a proposal
submission will include:
• Written results from a Nationally Recognized Testing Laboratory (NRTL) for certification
stipulating the radiant coefficient of the proposed heater
• The required quantity and input rating of the proposed radiant heater to attain the
necessary radiant heat to the floor to satisfy the heating design condition of the specified
radiant heating system
• The hourly gas consumption rate and resultant volumes of the products of combustion
C0
2
, CO and NOx of the proposed radiant heater to enable comparison to the specified
radiant heater
Part 4 — Accessories / Ancillaries
4.01 Temperature Control: Indoor Space Heating
A. GENERAL
Infrared Setback Thermostat will sense both infrared radiant temperature and ambient
temperature to realize accurate comfort control. The setback feature will automatically reduce
the set operating temperature by 9F° (5C°) when area lighting level is reduced due to an
unoccupied condition.
a. The thermostat will be comprised of a metal dome that will attach to a mounting plate
using two metal screws. All control circuitry and comfort temperature selection controls
will be mounted inside of the metal dome enclosure to protect the circuitry and provide
resistance to tampering with temperature settings.
i. Optionally tamper proof screws for mounting of the metal dome to the mounting
plate will limit access to thermostat settings to authorized personnel with access
to the special tool required to manipulate the screws
b. The thermostat will sense both infrared and ambient temperature and average the two to
maintain the comfort temperature setting within the heat zone
c. The thermostat will incorporate automatic temperature setback of 9F° (5C°) during an
unoccupied condition. A photoconductive cell will be used to sense occupancy within the
heater zone by sensing illumination. Resumption of the occupied state illumination level
will return thermostat temperature control to full comfort setting. A switching mechanism
will allow calibration of the photoconductive cell to the base illumination level for occupied
status. A switching mechanism within the thermostat will allow for disabling of the
temperature setback feature.
d. The thermostat mounting plate will attach to a standard 4” x 4” octagonal electrical box.
e. Electrical rating: 24 Vac
4.02 Heater Control: Outdoor Patio Heating Application
A. GENERAL
A Patio Control Panel will provide individual On/Off control for each heater or each heater
zone.
MODELS:
PCP-4 up to 4 Heaters or Zones Part #: 903000001
PCP-8 up to 8 Heaters or Zones Part #: 903000002
PCP-12 up to 12 Heaters or Zones Part #: 903000003