Paloma PH-28C Commercial Tankless Water Heater
Model Features:
- Endless hot water on demand
- Energy efficient
- Heats water only when it is needed
- Compact and takes no floor space (wall hung installation)
- Unmatched Safety Engineering
- Proprietary Film Wrap Overheat Limiter (on heat exchanger)
- Proprietary Oxygen Depletion Safety System (on indoor model)
- Flame failure and anti-boil protection
- Freeze protection to minus 30° F
- Built-in diagnostics and usage record
- Includes Digital Controller to set temperature and display diagnostics
- 100° to l80° F output temperature control
- Minimum flow for ignition: 0.66 GPM
- Power Return: AUTO-ON at last setting after power interruption
- Low NOx emissions
- Meets SCAQMD 1146 rule requirements
- Can be used in circulation systems up to 140° F
Multi-Unit System Features:
- 1 to 20 unit systems with 199,900 to 3.99 million BTU/hr inputs
- MIC-1 80 Manifold Controller quickly and tightly calibrates firing, temperature and volume output of each unit in system
- Control logic distributes heating load to maximize system life
- Can be delivered and installed in tight locations
- Built-in system back-up
- Units can be serviced without "bringing the system down"
LIMITED WARRANTY
3 YEAR/Heat Exchanger
1 YEAR/Parts
Single Unit Controller
 The UMC-117 Main Controller is used to set temperatures, display error codes and access maintenance information on a single unit installation.
In multi-unit systems, one Main Controller is used as the temperature controller and error display for the entire system. Others continue to be used to display diagnostic information on specific units.
One Main Controller is included with each unit.
The Main Controller can set temperatures between 100° to 180° F.
Paloma 28-C System Sizing Guide
|
SYSTEM
SIZE |
PEAK OUTPUT
GALLONS PER MINUTE |
HOURLY OUTPUT
GALLONS PER HOUR |
|
(number of units) |
45 degree rise |
70 degree rise |
100 degree rise |
45 degree rise |
70 degree rise |
80 degree rise |
|
1 |
7.4 |
4.8 |
3.4 |
444 |
288 |
204 |
|
2 |
14.8 |
9.6 |
6.8 |
888 |
576 |
408 |
|
3 |
22.2 |
14.4 |
10.2 |
1,332 |
864 |
612 |
|
4 |
29.6 |
19.2 |
13.6 |
1,776 |
1,152 |
816 |
|
5 |
37 |
24 |
17 |
2,220 |
1,440 |
1,020 |
|
6 |
44.4 |
28.8 |
20.4 |
2,664 |
1,728 |
1,224 |
|
7 |
51.8 |
33.6 |
23.8 |
3,108 |
2,016 |
1,428 |
|
8 |
59.2 |
38.4 |
27.2 |
3,552 |
2,304 |
1,632 |
|
9 |
66.6 |
43.2 |
30.6 |
3,996 |
2,592 |
1,836 |
|
10 |
74 |
48 |
34 |
4,440 |
2,880 |
2,040 |
|
11 |
81.4 |
52.8 |
37.4 |
4,884 |
3,168 |
2,244 |
|
12 |
88.8 |
57.6 |
40.8 |
5,328 |
3,456 |
2,448 |
|
13 |
96.2 |
62.4 |
44.2 |
5,772 |
3,744 |
2,652 |
|
14 |
103.6 |
67.2 |
47.6 |
6,216 |
4,032 |
2,856 |
|
15 |
111 |
72 |
51 |
6,660 |
4,320 |
3,060 |
|
16 |
118.4 |
76.8 |
54.4 |
7,104 |
4,608 |
3,264 |
|
17 |
125.8 |
81.6 |
57.8 |
7,548 |
4,896 |
3,468 |
|
18 |
133.2 |
86.4 |
61.2 |
7,992 |
5,184 |
3,672 |
|
19 |
140.6 |
91.2 |
64.6 |
8,436 |
5,472 |
3,876 |
|
20 |
148 |
96 |
68 |
8,880 |
5,760 |
4,080 |
How To Use The Sizing Guide
This Guide provides a quick reference to the hot water output of a system built on the 28C platform. It can help you size a system based on peak requirements in Gallons Per Minute or Gallons Per Hour.
Example 1 (see system size 4 units above): You are designing a hot water system for a shower room with six showers with 2.5 GPM flow rates, or a total system peak demand of 15 GPM. Inlet temperature in the winter is 40° F, and showering temperature is 104° F, for a rise of 64 degrees. The table shows that at a 70 degree rise, the first system above 15 GPM provides a full 19.2 GPM. Look left and see that this system consists of four 28-C units.
Example 2 (see system size 10 units above): A similar storage-based system you previously designed could deliver 2,000 gallons of 140° F hot water at maximum output. Now you want to get an initial feel for the sizing of a Paloma 28-C system that could be used instead. In your part of the country, you know that winter temperatures will require almost a 100 degree rise in water temperature to reach 140° F. So you find the Hourly Output of 2,000 Gallons in the column for 100 degree temperature rise. Then you move left to the System Size column, and read that a 10-unit system is a good starting point in the design process.
|
Specifications for the Paloma 28C Series |
|
|
Indoor Models |
Outdoor Models |
Direct Vent Models |
|
Natutal Gas Model Number |
PH-28C IFSN |
PH-28C OFN |
PH-28C DVSN |
|
LP Gas Model Number |
PH-28C IFSP |
PH-28C OFP |
PH-28C DVSP |
|
Vent Size |
4" Category III Stainless Venting with Paloma Vent Adapter or Equivalent |
N/A |
4" Category III Stainless Venting with Paloma Vent Adapter plus Special Terminator |
|
Maximum Vent Length |
37.5 ft. with 3 Elbows |
N/A |
37.5 ft. with 3 Elbows |
|
Safety Engineering |
Oxygen Depletion Safety System |
N/A |
Oxygen Depletion Safety System |
|
Heat Exchanger Film Wrap Overheat Limiter |
|
Flame Failure Safety Monitor (Flame Rod Type) |
|
Anti-Boil Protection |
|
Rated Gas Input |
19,000 - 199,900 BTU/hr (Modulating) |
|
Dimensions |
14-7/8" W x 25-3/8" H x 11-1/8" D |
|
Net Weight |
55 lbs. |
|
Working Water Pressure |
14-150 PSI |
|
Minimum Flow for Ignition |
0.66 GPM |
|
Maximum Output |
7.4 GPM |
|
Temperature Range |
100-180°F (with Controller) |
|
Gas Connection |
3/4" NPT Female (Gas Shutoff Valve Included) |
|
Water Connection |
3/4" NPT Male |
|
Efficiency Rating |
84% |
|
DoE Energy Factor |
0.82 |
|
Electrical Requirements |
120 V/60 Hz AC, 2 Amps |
|
Freeze Protection |
Minus 30°F (Including Wind Chill Factor) |
|
Controller/Diagnostic Display |
UMC-117 (Included) |
|
Multi-Unit System Controller (Sold Separately) |
2-6 Unit System: MIC-180 (Includes Installation Box) |
|
7-20 Unit System: MIC-180 + MICS-180 |
-
High Altitude Controller upgrade required for installations above 3,280 ft.
-
Supports both horizontal and vertical venting using UL 1738 certified, Category III 4" stainless steel venting (NEVER USE TYPE "B" VENTING).
Paloma MIC-180 Manifold Controller
 The optional MIC-180 Manifold Controller is used to control operations in a multi-unit system of 2-20 units. The MIC-180 Controller kit includes the control logic for a base system with 2-6 units, a power cord, and an installation box suitable for outdoors.
For larger systems add an MICS-180 Extended Communication Board which will fit in the top half of the installation box.
The controller connects to the individual units using Paloma communication cables available in 16, 32, and 65 foot lengths. |
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