Reznor RXH (Outdoor PreevA) Unit Installation Manual - Manual (Page 22)

Form I-RDH/REH/RHH/RXH (12-14), Page 22
6.1.4 Optional Gas
Pressure Safety
Switches
If the manifold is equipped with optional high and/or low gas pressure switches, the
switches protect against an upstream gas control malfunction that would cause an
increase or decrease in the regulated gas pressure.
The low gas pressure switch is an automatic reset switch that is factory set to activate
if the gas pressure is 50% of the minimum as stated on the unit rating plate.
The high gas pressure switch is a manually reset switch that is set to activate if the gas
pressure is 125% of the outlet pressure stated on the rating plate.
6.2.1 Heat Section Condensate Drain - Model RDH with Option CS2
If Option CS2 was selected, the gas heat section is equipped with a condensate drain
with a 3/8” PVC connection. See location in FIGURE 14A. This burner condensate
drain is required when one or both of these situations exists:
• A cooling coil is installed upstream of the heat section.
• The temperature rise for a makeup air unit is equal to or less than 60°F.
6.2 Heat Section
Condensate
Drain(s) - Models
RDH and RHH
1/2” Male NPT connection for
installer to connect a drain
line. Put a trap in the line (see
Paragraph 6.6.4) and empty
into a sanitary drain system.
Periodic cleaning of the con-
densate disposal system is
required.
FIGURE 14A -
Location of
Option CS2
Heat Section
Condensate
Drain
Connection -
Model RDH
(Does NOT apply to
AG58 or D12G; see
NOTE on page 19.)
TABLE 13 - BTUH
Inputs and Capacities
by Altitude for Model
RHH
BTUH Inputs and Capacities by Altitude in the UNITED STATES for Model RHH
ALTITUDE RHH Size130 RHH Size 180 RHH Size 260 RHH Size 350
Feet Meters
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
0 - 2000 0 - 610 131000 120520 175000 159,250 260,000 236,600 345,000 313,950
2001 - 3000 611 - 915 123140 113289 164500 149,695 244,400 222,404 324,300 295,113
3001 - 4000 916 - 1220 120520 110878 161000 146,510 239,200 217,672 317,400 288,834
4001- 5000 1221 - 1525 117900 108468 157500 143,325 234,000 212,940 310,500 282,555
5001 - 6000 1526 - 1830 115280 106058 154000 140,140 228,800 208,208 303,600 276,276
6001 - 7000 1831 - 2135 112660 103647 150500 136,955 223,600 203,476 296,700 269,997
7001 - 8000 2136 - 2440 110040 101237 147000 133,770 218,400 198,744 289,800 263,718
8001 - 9000 2441 - 2745 107420 98826 143500 130,585 213,200 194,012 282,900 257,439
9001 - 10000 2746 - 3045 104800 96416 140000 127,400 208,000 189,280 276,000 251,160
BTUH Inputs and Capacities by Altitude in CANADA for Model RHH
ALTITUDE RHH Size130 RHH Size 180 RHH Size 260 RHH Size 350
Feet Meters
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
Normal Input
(BTU/HR)
Thermal Output
Capacity (BTU/HR)
0 - 2000 0 - 610 131000 120520 175000 159,250 260,000 236,600 345,000 313,950
2001 - 4500 611 - 1373 117900 108468 157500 143,325 234,000 212,940 310,500 282,555
6.0 Mechanical
(cont’d)
6.1 Gas Piping and Pressures - Models RDH and RHH (cont’d)
6.1.3 High Altitude Operation - Gas-Fired Model RDH or RHH being
installed above 2000 ft (610M) (cont’d)
6.2.2 Condensate
Drain - Model RDH
with Option AG58 or
D12G Modulating Gas
Control
A Model RDH unit with modulating gas control Option AG58 or D12G requires a con-
densate drain from the vent area. The 1/2” PVC connection is underneath the unit; see
FIGURE 15. Since this drain will be used during the heating season, the connection
is under the unit and the drain should be run down through the inside of the roof curb
and into the heated space. Put a trap in the line (Paragraph 6.6.4) and empty it into a
sanitary drain.
11-3/8”(289mm)
30-7/8”
(784mm)
3-3/16”
(81mm)
Control Side View
Front
View
FIGURE 14B - Location
of Condensate Drain
Connection - Model
RDH with Gas Control
Option AG58 or D12G