WaiWela - Quality Tankless Water Heaters - Products

PH-28RIFS N/P Residential Indoor
Gas Tankless Water Heater

Digital main remote controller included (UMC-117)
Auto recovery function
Direct connect two-unit capability (requires DUOnex cable)
10 year/3 year warranty
Low NOx emissions
Electronic spark ignition, no pilot
10 foot 120 vac power cord included
Wall mount hardware included
Freeze protected to -30°F
Hydronic heating applications
Optional remote controllers available
Draft backflow preventer included
Energy Factor of 0.82

Unique safety features:

Equipped with oxygen depletion system
Film type overheat sensing
Flame failure safety device

Manual (4.21MB, pdf)
Brochure (335KB, pdf)

Technical Specifications and Submittal Sheets

Paloma Industries is the #1 gas appliance manufacturer in Japan. The residential model PH28 incorporates TWO unique safety features not found on competitive tankless gas water heaters.

First is the OXYGEN DEPLETION SENSING system (Indoor Model Only). Emissions from the sampling burner are constantly analyzed for carbon monoxide gas. If necessary, the fan speed is adjusted by the on board cpu. If the fan speed adjustments do not resolve the combustion problem, the burner will be turned off and a potentially dangerous situation avoided. An error message will be displayed.

Second is the FILM TYPE OVERHEAT SENSING. Waiwela alone senses high temperature at all positions surrounding the combustion chamber. Other manufactures only sense at one point on the combustion chamber.

Three remote controls (one main control and two bath remote controls) can be installed together. One main remote control (UMC-117) comes with each unit.

10 Year warranty on heat exchanger.
3 Year warranty on parts.

Technical Specifications

SPECIFICATIONS - MODELS AND VENTING FOR ALL PH-28R MODELS
BTU Input Range	19,000 ~ 199,900 (fully modulating)
Maximum Hot Water Output	8.5 GPM (40 degree rise at 30 psi)
Minimum Flow for Ignition	0.66 GPM
Dimensions (inches)	14 7/8 (w) x 25 3/8 (h) x 11 1/8 (d)
Working Water Pressure	14 ~ 150 psi
Temperature Range	100 ~ 140 degrees F
Gas Connection	3/4" NPT Femal (with included gas shutoff valve)
Water Connection	3/4" NPT Male
Efficiency Rating	84%
DOE Energy Factor	0.82
Gas Inlet Pressure (Indoor and Outdoor Models)	Natural Gas : Min 4.0"W.C.; Max 10.5"W.C. LP Gas: Min 8.0"W.C.; Max 14.0"W.C.
Gas Inlet Pressure (Direct Vent Model)	Natural Gas: Min 4.5"W.C.; Max 10.5"W.C. LP Gas: Min 10.0"W.C.; Max 14.0"W.C.
Low NOx Compliant (SCAQMD Rule 1146.2)	Yes
Electrical Requirement	120 V/60 Hz AC, 2 Amps
Power Cord (Except Outdoor)	10-foot. 3-pin indoor power cord (pre-installed)
Freeze Protection	Minus 30 degrees F (including windchill factor)
Controller/Diagnostic Display	UMC-117
Electric Manifold Ready?	Yes: 2 to 20 units (use MIC-180 controller)
DUOnex™ Ready?	Yes: 2 units with DUOnex™ Cable
Gas Shutoff Valve	Included
Vent Requirement (Indoor/Direct Vent)	4" Category III stainless steel venting required
Vent Maximum Length	37.5 feet (with three 90-degree elbows)
Air Intake (Direct Vent)	4" Stainless Steel, PVC or aluminum
Air Intake Maximum Length	37.5 feet (with four 90-degree elbows)
Net Weight	55 lbs.
SAFETY ENGINEERING
Carbon Monoxide Safety	ICAD™ - Proprietary system to monitor and optimize combustion (Not on Outdoor version)
Flame Failure	Three separate flame rods to monitor flame failure.
Anti-boil Protection	Temperature Sensor
Anti-scald Protection	- Bath controller maximum temp 120°F - When on, Bath Controller takes priority over others. - While hot water is running, Bath Controller max. temp. cannot be raised above 112°F.
FEATURES
Continuous hot water on demand Energy-Saving design Energy efficiency - 30% more efficient than tank-type water heaters Compact, space-saving design Self-diagnostic program UMC-117 Main Digital Remote control Remote control displays adjustable temperature settings Exclusive film wrap overheat limiter May be installed as part of a circulating water system Built-in electric blower on all models Double the performance with DUOnex™ 2-to-20 unit systems with MIC-180 Controller Extensive diagnostics and error display
WARRANTY
10 year (Heat Exchanger) / 3 year (Parts)