Reznor VR Unit Installation Manual - Manual (Page 25)

Form I-VR, P/N 205202 R13, Page 24
and 14” w.c. for Sizes 175-200. For propane gas, the inlet pressure must
be between 11” and 14” w.c. Take this reading as close as possible to the
heater (Heaters are equipped with gas valves that have an inlet pressure
tap.) If the inlet pressure is not within the specified range, the inlet pressure
must be corrected and Steps 3 and 4 repeated.
6. Find the High Altitude Adjustment label in the plastic bag that contained
these instructions. Using a permanent marker, fill-in the appropriate infor-
mation from the tables below. Select a position for the label on the rear of
the burner/control box adjacent to the rating plate. Be sure the surface is
clean and dry and adhere the label.
BTUH Inputs
by Altitude
BTUH Inputs by Altitude in the United States
ALTITUDE NORMAL INPUT
Feet Meters Size 50 Size 75 Size 100 Size 125 Size 150 Size 175 Size 200
0 - 2000 0 - 610 50000 75000 100000 125000 150000 175000 200000
2001 - 3000 611 - 915 44000 66000 88000 110000 132000 154000 176000
3001 - 4000 916 - 1220 42000 63000 84000 105000 126000 147000 168000
4001 - 5000 1221 - 1525 40000 60000 80000 100000 120000 140000 160000
5001 - 6000 1526 - 1830 38000 57000 76000 95000 114000 133000 152000
6001 - 7000 1831 - 2135 36000 54000 72000 90000 108000 126000 144000
7001 - 8000 2136 - 2440 34000 51000 68000 85000 102000 119000 136000
8001 - 9000 2441 - 2745 32000 48000 64000 80000 96000 112000 128000
9001 - 10000 2746 - 3051 30000 45000 60000 75000 90000 105000 120000
BTUH Inputs by Altitude in Canada
ALTITUDE NORMAL INPUT
Feet Meters Size 50 Size 75 Size 100 Size 125 Size 150 Size 175 Size 200
0 - 2000 0 - 610 50000 75000 100000 125000 150000 175000 200000
2001 - 4500 611 - 1373 45000 67500 90000 112500 135000 157500 180000
6.4 Venting and
Combustion Air
Venting must be in accordance with the National Fuel Gas Code NFPA 54/
ANSI Z223.1 (latest edition) or CAN/CSA B149.1 (latest edition), and all local
codes.
The ANSI standard applicable to this heater does not require venting catego-
rization. If such a requirement existed, this heater would be in Category III.
(Category III appliances have a positive-pressure vent requiring a gas tight
sealed vent system.) These tubular infrared heaters have been designed to
operate safely and efficiently with vent pipe lengths shown in the Vent Length
Table below. Vent systems may either be vertical or horizontal. The type of vent
required depends on the size of heater and the vent run configuration.
6. Mechanical
(cont’d)
Vent Category Table Type of Vent Required by Vent Category
Model Sizes 50, 75, 100, 125 150, 175, 200
-- with a Horizontal Vent Run Category III Category III
-- with a Vent Run that is at least 1/2 vertical
(using equivalent lengths from the Vent Length
Table below)
Category I or
Category III
Category III
-- with a Dual Vent Adapter, Option CC5 Category III Category III
Vent terminal end may be either single-wall pipe or double-wall pipe. A vent
terminal cap is required. Dual venting of two units is permissible when using
an Optional Dual Vent Kit (Option CC5). Comply with the specific requirements
and instructions in the following paragraphs.
1. Vent Pipe Length - The vent lengths shown in the Vent Length Table are
based on (1) the maximum permissible resistance to flow at which each model
size will operate and (2) the potential for continuous condensing. Condensing
in the vent pipe should not occur after equilibrium has been reached when the
6.4.1 Specific Venting
Requirements
6.3 Gas Piping
and Pressures
(cont’d)