SPECIFICATIONS (Approx.)
Model
PH2-20R OFN, PH2-20R OFP,
PH2-25R OFN, PH2-25R OFP
PH2-28R OFN, PH2-28R OFP
PH2-20R DVSN, PH2-20R DVSP
PH2-25R DVSN, PH2-25R DVSP
PH2-28R DVSN, PH2-28R DVSP
Purpose
Domestic Hot Water Supply
Rated Gas Input
(Btu/Hr.)
11,000 (Min.) ~ 150,000 (Max.) (PH2-20R Series) Modulating
11,000 (Min.) ~ 180,000 (Max.) (PH2-25R Series) Modulating
11,000 (Min.) ~ 199,900 (Max.) (PH2-28R Series) Modulating
Dimensions (in.)
13 7/8 (W) x 23 5/8 (H) x 8 7/8 (D)
13 7/8 (W) x 25 5/8 (H) x 9 7/8 (D)
Net Weight (lbs.)
60
Installation
Outdoor Wall Mounting Type
Direct Vent Indoor Wall Mounting Type
Can be vented either horizontally or vertically
Working Water Pressure
14 psi ~ 150 psi
Minimum Water Flow
0.40 GPM
Maximum Flow Rate
6.4 GPM (PH2-20R); 8.4 GPM (PH2-25R); 9.5 GPM (PH2-28R) at 35ºF Temp. Rise
Gas Connection
3/4” NPT Female (w/supplied Gas Shutoff Valve)
Water Connection
3/4” NPT Male
Vent Size
N/A (Outdoor Installation)
3”/5” Concentric Special Venting (Category III)
Max. Vent Length
N/A (Outdoor Installation)
36 Feet with Three 90º Elbow
Effi ciency Rating
84%
Energy Factor
0.82
Inlet Gas Pressure
before water heater
Natural Gas: Min. 4.0” w.c. Max. 10.5” w.c.
L.P. Gas: Min. 8.0” w.c. Max. 13.0” w.c. (Do not exceed maximum pressure.)
Hot Water Supply
Adjusting Range
85ºF ~ 120ºF (140ºF) (Residential)
Adjusting Range
85ºF ~ 185ºF (Commercial) (By conversion kit)
Max. Setting
W/ Main Remote Control (UMC-117) & Adjustment
Electrical Portion
Electrical Rating
120VAC/60Hz, Less than 2 Amps
Power Supply Cord
3 Pin Power Supply Cord 10 Feet (Direct Vent)
Safety Devices
Oxygen Depletion Safety
Sensing Burner (Direct Vent)
Over Heat Limiter
Film Type for Entire Heat Exchanger
Flame Failure Safety
Flame Rod Type
Freeze Protection
Minus 30ºF (Without Wind-Chill Factor)
Optional Accessory
First Bath Remote Control (USC1-117); Second Bath Remote Control (USC2-117)
DUOnex ™ for 2-Unit Manifolding
MIC-185 for Multi-Unit System Controller (2 to 6 units); MICS-180 for Expansion Board
(Up to 20 units); Communication Cables for MIC-185 (16, 32 & 65 feet)
MIC-6 for Manifold Controller (2 to 6 units); Manifold Cables for MIC-6 (6 & 18 feet)
High Altitude Setting
High Altitude DIP Switch Adjustment
Hot Water Flow Rate and Temperature Rise
Temp. Rise (ºF)
35
45
50
60
70
80
90
100
Water Flow (GPM)
PH2-20R
6.4
5.6
5.1
4.2
3.6
3.2
2.8
2.5
Water Flow (GPM)
PH2-25R
8.4
6.7
6.1
5.1
4.3
3.8
3.4
3.0
Water Flow (GPM)
PH2-28R
9.5
7.4
6.6
5.5
4.7
4.1
3.7
3.3
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Note: Special Venting: The adapter, vent pipe, elbow, vent terminal, etc. should be UL 1738 Certifi ed Category III Stainless
Steel Venting Materials .
“B” vent is not permitted.
Since we are constantly improving our products, all specifi cations are subject to change without notice.
Summary of Contents for PH2-20R DVSN
Page 158: ... 158 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 159: ... 159 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 160: ... 160 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 162: ... 162 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 163: ... 163 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 164: ... 164 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 166: ...Schematic Disassembly PHH 32RDV PHH 25RDV 166 ...
Page 167: ...Schematic Disassembly PHH 32RDV PHH 25RDV 167 ...
Page 169: ... 169 Schematic Disassembly PHH 32ROF PHH 25ROF ...
