Submittal Sheet

2
Keystone Water Heater Submittal
Appliance
S
urface
Suggested Service
Access Clearance
inches [cm]
Left Side 1 [2.5]
Right Side 12 [31]
Top 24 [61]
Back 6 [15]
Closet, Front 6 [15]
Alcove, Front 24 [61]
Vent N/A
Sizes
B
oiler
Pump Connections Ratings
(System Pump and DHW Pump
Connections)
Volts Phase Amps
KW 199 - 850
No Pump
120 Single 2* N/A
* Minimum 15A circuit required
Size
Intake
(Air) Pipe
Exhaust
(Vent) Pipe
Maximum Allowable
Equivalent Length*
Ft [m]
KW 199 3” 3” 100 [30]
KW 285
3” 3” 20 [6.1]
4” 4” 100 [30]
KW 399 4” 4” 100 [30]
KW 500 4” 4” 100 [30]
KW 600
4” 4” 40 [12]
6”** 6”** 100** [30]**
KW 750
4” 4” 40 [12]
6” 6” 100 [30]
KW 850
4” 4” 40 [12]
6” 6” 100 [30]
Installations in the U.S. require exhaust vent pipe that is a combination of PVC & CPVC complying with
ANSI/ASTM D1785. F441, polypropylene pipe that complies with ULC S636, or stainless steel complying with
UL1738. Installations in Canada require exhaust vent pipe that is certified to ULC S636.
Intake (air) pipe may be ABS, PVC, CPVC or galvanized material.
Installer must comply fully with manufacturer’s installation instructions, including use of minimum exhaust length
CPVC, to maintain ANSI Z21.13 safety certification
Closet and alcove installations do not allow the use of PVC under any circumstances
* To calculate max equivalent length, measure the linear feet of the pipe, and add 5 feet (1.5 m) for each elbow used.
** Allowed only if the vent pipe is no more than 20 equivalent feet longer than the air pipe
Vent System
Clearances and Electrical Data