WaiWela Quality Tankless Water Heaters
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PH-28RDVS

PH-28RDVS N/P Residential Direct Vent
Gas Tankless Water Heater

This unit qualifies for the Federal Tankless Tax Credit.
30% of the total cost(including installation), up to $1,500.

  • Digital main remote controller included (UMC-117)
  • Auto recovery function
  • Direct connect two-unit capability (requires DUOnex cable)
  • Wall mounted space saving features.
  • High gal/min capacity at temperatures up to 180F and a never ending supply.
  • Energy efficient tankless concept only uses that amount of gas necessary to fill the demand.
  • Serviceability without system interruption. Heater modules can be removed from service without taking the system down.
  • 12 year/5 year/1 year warranty*
  • Excellent tech support.
  • Energy Factor of 0.82

Unique safety features:

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

This line of tankless water heaters incorporates TWO unique safety features not found on others.

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.

WARRANTY*
12 Year warranty on heat exchanger
5 Year warranty on parts
1 Year warranty on service
*Effective on all water heaters purchased after 07-01-2008

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*
  • 12 year (Heat Exchanger) / 5 year (Parts) / 1 year (Service)
    *Effective on all water heaters purchased after 07-01-2008

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