lp-445-r4 Rev. 006 Rel. 027 Date 7.21.20
12
A
C
D
E
G
F
B
ACCESS PANEL
(CONTROL BOARD)
COLD WATER
INLET
HOT WATER
OUTLET
ACCESS PANEL
(ELECTRICAL)
CONDENSATE
DISCHARGE
GAS LINE
H
J
Q
POWER SWITCH
DISPLAY PANEL
R
P
EXHAUST
AIR INTAKE
K
L
M
O
N
LP-445-C
11/30/18
NOTE: ALL DIMENSIONS ARE APPROXIMATE AND HEIGHTS DO NOT INCLUDE ADJUSTABLE LEGS.
FRONT
(ALL MODELS)
RIGHT SIDE
(ALL MODELS)
LEFT SIDE
(ALL MODELS)
REAR
(ALL MODELS)
MODEL
BTU/HR
INPUT
RANGE
Gross
Output
BTU/hr
Net I=B=R
BTU/hr
Thermal
Efficiency
Boiler
Water
Supply/Return
Connection
Gas
Conn.
Vent
Dia.
Ship.
Wt.
High
Fan
Speed
Low
Fan
Speed
Fan Speed
at Ignition
500
100,000 - 500,000
470,000
408,900
94%
4.2 gal.
2"
1-1/2"
4"
505
7200
1950
3000
700
170,000 - 700,000
686,000
596,820
98%
5.8 gal.
2"
2"
6"
580
5700
2200
3000
850
170,000 - 850,000
799,000
695,130
94%
5.8 gal.
2"
2"
6"
580
6800
2200
3000
MODEL
A
B
C
D
E
F
G
H
J
K
L
M
N
O
P
Q
R
500
20"
14-3/4"
6-1/4" 13-1/4" 14-1/2" 33-1/4" 5-1/8" 20-1/2" 36" 43-3/4"
46"
48"
8-1/4" 25-1/2" 10-1/2"
5"
3"
700
20"
20"
6-1/4" 16-1/4" 18-3/4" 43-1/2"
20"
20-1/2" 36" 62-1/4" 68-1/2"
73"
8-1/4" 25-1/2" 10-1/2"
5"
3"
850
20"
20"
6-1/4" 16-1/4" 18-3/4" 43-1/2"
20"
20-1/2" 36" 62-1/4" 68-1/2"
73"
8-1/4" 25-1/2" 10-1/2"
5"
3"
Figure 5 - Boiler Dimensions - NOTE: All Dimensions Are Approximate - VWH in Model Number Denotes Volume Water Heater Model
scale build-up throughout the system. Water below 5 grains/
gallon (85 mg/L) may be over softened.
• Consult local water treatment companies for unusually
hard water areas (above the required amounts) or for other
treatment solutions if water is being over softened (below 5
grains/gallon [85 mg/L]).
• Chloride concentration less than 100 ppm (mg/L)
• Do not fill appliance or operate with water containing
chlorides in excess of 100 ppm (mg/L).
• Using chlorinated fresh water should be acceptable as levels
are typically less than 5 ppm (mg/L).
• Do not connect the appliance to directly heat swimming
pool or spa water.
• Total Dissolved Solids (TDS) less than 500 ppm (mg/L)
• Total dissolved solids are minerals, salts, metals, and
charged particles that are dissolved in water.
• The greater the amounts of TDS present, the higher the
corrosion potential due to increased conductivity in the
water.
• If using softened water to fill the appliance, it is still
possible to have high TDS. This water can be corrosive.
Consult local water treatment companies for other
treatment solutions to reduce this effect.
*NOTE:
It is recommended to clean the heat exchanger at least
once a year to prevent lime scale buildup. To clean the heat
exchanger, follow the maintenance procedure in this manual.
