Product Brochure

21
6-175.7
SPECIFICATIONS - ALL MODELS
General
A. Standards
All unit(s) shall include:
A.1. 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.2. Furnace(s) section with 82% minimum efficiency
provided by an indirect-fired tubular heat exchanger
with individually fired tubes.
C. Venting Arrangement
C.3. 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.
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. (PTS/BTS models)
D.1.a. The unit heater(s) casing shall be constructed of not
less than 22 gauge aluminized steel with minimization
of exposed fasteners. (HDS/HDC models)
D.2. All exterior casing parts casing parts shall be cleaned of
all oils and a phosphate coating applied prior to
painting. All exterior casing parts shall be painted with a
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.c. The heat exchanger(s) shall be made of 18 gauge
aluminized steel tubes and headers (opt 409 stainless
steel). The thermal efficiency of the unit(s) shall be a
minimum of 82% efficient for all air flow ranges. 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 aluminized
steel (opt 409 stainless).
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 is (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 system
is energized.
E.8. The unit gas controls shall be provided with the
following:
E.8.d. (opt) 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.8.e. (opt) Two-stage gas controls with a two-stage
combination gas control, an ignition control, and a two-
stage low voltage thermostat. The unit fires at 50% fire
on low stage or 100% fire on high stage of the unit
based on the call for heat from either a room or duct
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.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 in 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. A low voltage terminal board shall be provided for direct
wiring connection to an external thermostat.
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 wiring shall be in flexible metal BX conduit.
G.3. (opt) 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)
(open drip proof (ODP) on HDS units 75MBH and smaller).
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)
(open drip proof (ODP) on all HDC models).
G.5.b. The motor shall be rated for:
(a) 115V/60Hz/1Ph
(b) 208V/60Hz/1Ph (BTS model)
(c) 230V/60Hz/1Ph (BTS model)
(d) 208V/60Hz/3Ph (BTS model)
(e) 230V/60Hz/3Ph (BTS model)
(f) 460V/60Hz/3Ph (BTS model)
(g) 575V/60Hz/3Ph (BTS model)