Brochure

17
6-170.9
SPECIFICATIONS - ALL MODELS
General
A. Standards
All unit(s) shall include:
A.2. ETL design certification for use in both the US and
Canada to the ANSI Z83.8 - latest revision, standard for
“Gas Unit Heater and Gas-Fired Duct Furnaces” for safe
operation, construction, and performance.
B. Mechanical Configuration
B.3. Condensing furnace section with up to 97% efficiency
provided by an indirect-fired tubular heat exchanger with
individually fired tubes coupled to a secondary
recuperative heat exchanger for maximum heat
recovery.
C. Venting/Combustion Air Arrangement
C.4. The unit shall be separated combustion. The venting
shall be a power exhausted arrangement with a
separate combustion air intake pipe connection to allow
for fresh combustion air from outside the conditioned
space. The unit shall be tested to insure proper ignition
when the unit is subjected to 40 mile per hour wind
velocities. The unit shall also include a factory mounted
differential pressure switch designed to prevent main
burner ignition until positive venting has been proven.
Venting shall be Schedule 40 PVC. For Canadian
installations, all vent pipe and components must be
approved to ULC S636.
D. Unit Casing
D.1. The unit heater(s) casing shall be constructed of not
less than 20 gauge aluminized steel with minimization
of exposed fasteners.
D.2. All exterior casing parts casing parts shall be cleaned
of all oils and a phosphate coating applied prior to
painting. The exterior casing parts shall then be painted
with an electrostatically applied baked-on gray-green
polyester powder paint (7-mil thickness) for corrosion
resistance.
D.3. The unit shall be furnished with horizontal air deflectors.
The deflectors are adjustable to provide for horizontal
directional airflow control (up or down).
E. Furnace Section
E.1.e. The primary heat exchanger(s) shall be made of
18 gauge aluminized steel (opt 409 stainless steel)
tubes and headers. Each heat exchanger tube shall
be individually and directly flame-fired. The heat
exchanger tube shall be crimped to allow for thermal
expansion and contraction. The flue collector box shall
be made of 20 gauge AL29-4C stainless steel.
The thermal efficiency of the unit(s) shall be a minimum
of 93% efficient for all air flow ranges through the use of
a secondary recuperative heat exchanger. The
secondary heat exchanger shall be constructed of
AL29-4C stainless steel to withstand the corrosive
environment of condensing gas fired equipment.
E.2. The heat exchanger(s) seams and duct connections
shall be certified to withstand 0.9" W.C. external static
pressure without burner flame disturbance.
E.3.a. The burner(s) shall be in-shot type, directly firing each
heat exchanger tube individually and are designed for
good lighting characteristics without noise of extinction
for both natural and propane gas.
E.5. The ignition controller(s) shall be 100% shut-off with
continuous retry.
E.6. The gas pressure shall be between 6-7" W.C for natural
gas (opt). The gas pressure shall be 11-14" W.C. for
propane gas.
E.7.a. The solid state ignition system shall directly light the
gas by means of a direct spark igniter each time the
thermostat calls for heat.
E.8. The unit gas controls shall be provided with the
following:
E.8.d. Single-stage gas controls with a single-stage
combination gas control, an ignition control, and a
single-stage low voltage thermostat. The unit fires at
100% full fire based on a call for heat from a room
thermostat.
E.9. An automatic reset high limit switch mounted in the air
stream to shut off the gas supply in the event of
overheating.
E.9.a. An automatic reset high limit switch mounted on the
power exhauster housing to shut off the gas supply in
the event of overheating flue gas temperatures.
E.9.b. A condensate drain line overflow switch that senses if
the condensate line is clogged and shuts the unit heater
down.
E.10. A time delay relay that delays the start of the air mover
to allow the heat exchanger a warm-up period after a
call for heat. The time delay relay shall also continue the
air mover operation after the thermostat has been
satisfied to remove any residual heat on the heat
exchanger.
E.11. The unit shall be orificed for up to 2000' elevation above
sea level (opt the unit shall be orificed for _____
elevation above sea level).
F. Electrical
F.1. All electrical components shall carry UL, ETL, or CSA
listing.
F.2. Low voltage terminal board.
F.3. A single 115V to 24V step down transformer shall be
provided for all unit controls.
G. Air Mover
G.1. The motor horsepower shall be ____.
G.2. The motor shall be factory wired (PTC Models).
G.3. The motor shall be controlled by a time delay relay.
G.4. Propeller models shall meet the following requirements.
G.4.a. The motor type shall be Single-speed, totally enclosed (TE)
G.4.b. The motor shall be rated for: (a) 115V/60Hz/1Ph
G.5. Blower models shall meet the following requirements:
G.5.a. The motor type shall be single-speed, totally enclosed
(TE)
G.5.b. The motor shall be rated for:
(a) 115V/60Hz/1Ph
(b) 208V/60Hz/1Ph (BTC model)
(c) 230V/60Hz/1Ph (BTC model)
(d) 208V/60Hz/3Ph (BTC model)
(e) 230V/60Hz/3Ph (BTC model)
(f) 460V/60Hz/3Ph (BTC model)
(g) 575V/60Hz/3Ph (BTC model)
Note: Specifications below are extracted from a master gas-fired unit heater specification and therefore
certain numbered sections have been intentionally omitted.