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3. GENERAL INFORMATION
•
Your heater comes fully assembled and is tested
at the factory with the appropriate type of gas
and at the input pressures stated on the name-
plate.
•
Upon receipt and prior to attempting installation,
be sure to inspect the heater and its packaging
for damage and/or missing components. If
damage is found or missing components are
suspected, contact your dealer. See Chapter 5
for a complete listing of items required for the
safe and efficient installation and use of this
heater.
•
Never attempt to operate the heater using a
fuel other than that specifically identified on the
nameplate.
•
The installation of the heater must conform with
all local building codes or, in absence of gov-
erning local codes, with the National Fuel Gas
Code, ANSI Z223.1 (NFPA 54). This code can
be obtained from either the: Canadian Standards
Association, 8501 East Pleasant Valley Road,
Cleveland, OH 44131; or, NFPA, Battery March
Park, Quincy, MA 02269.
•
Canadian installations must comply with CAN/
CGA-B149.1.2 gas code which can be purchased
from Canadian Gas Association, 55 Scarsdale
Road, Don Mills, Ontario M3B 2R3.
•
Contact factory when appliance is to be installed
at high altitudes. Factory can supply high altitude
conversion kit with instructions and data plate.
•
A plugged 1/8" N.P.T. Test Gage Connection is
provided on the heater gas control.
•
See Tables 1 and 2 for heater specifications:
MODEL
BTU/HR. RATING
NO.
NATURAL
MH/HS25NG
25,000
MH/HS22LP
—
MODEL
OPERATING
NO.
PRESSURE
MH/HS25NG
6.0"w.c.
MH/HS22LP
10"w.c.
Model # HS25NG/LP
Table 1. BTU Ratings and Supply Pressures
GAS
MIN.
PROPANE
NAT.
—
7.0"
22,000
—
Table 2. Heater Dimensions and Orifice Sizes
ORIFICE SIZE
BURNER
PILOT
45
.018
55
.011
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause property
damage, injury or death. Read the installation,
operation, and maintenance instructions thoroughly
before installing or servicing this equipment. For
assistance or additional information consult a qualified
installer, service agency, or gas supplier.
•
For additional information contact Mr. Heater Toll-
Free 866-477-2194—www.mrheater.com
The following extra NFPA Manuals are helpful when
installing this heater in a location not anticipated in this
manual:
Number
NFPA 88
Clearances to Combustible Surfaces
NFPA 409
Clearances to Combustible Surfaces
DO NOT EXCEED 1/2 PSI INLET PRESSURE TO HEATER
Provide adequate clearance to combustibles per Table 3
at control end of heater for servicing and minimum on top
and sides for ventilation and combustion air supply.
A minimum clearance of 8' above floor for public garages
in accordance with NFPA No. 88 most recent edition, or
Figure 1; whichever is larger.
Canadian installations in public garages must comply with
CGA 149B.1.9 most recent edition.
WARNING: Maintain clearances as shown in Figure 2
or on heater nameplate.
GAS SUPPLY PRESSURE (W.C.)
MAX.
L.P.
NAT.
L.P.
—
14"
—
11"
—
14"
INPUT
BTU/H
WIDTH
LENGTH
25.000
12-1/4"
29-3/4"
22,000
12-1/4"
29-3/4"
Installation instructions and Owner's Manual
E4
Related Subject
ORIFICE
MANIFOLD
SIZE
NAT.
L.P.
NAT.
L.P.
6"
—
45
—
—
10"
—
55
SIZE
HEIGHT
WEIGHT
7"
20 lb.
7"
20 lb.
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