Instruction manual
Model HF85R                       7 
WATER HEATING COIL (MODEL SHW4) 
ARDENT ENERGY heating units are designed to heat your do-
mestic hot water during the heating season. 
The HF85R can accept one or two coils (1 per side). The coil 
replaces all but one of the firebrick on the side located. 
Procedure
: 
NOTE: Ensure installation complies with local plumbing codes. 
1.  Remove both side shrouds by unscrewing the 
screws at back. 
2.  Remove rear heat shield and punch out the 2 
knockouts on the side desired. Knock outs are 
tight, out of necessity. A sharp blow with a heavy 
hammer will be required. 
3.  Loosen cross draft angle nuts on side of unit. (2 
each side located on outside of firebox). 
4.  Remove brick from that side. 
5.  Punch out 2 knockouts at back of stove. Reach in 
through punched out holes with a bar extension 
and punch out knockouts in primary heat ex-
changer. (see Fig 5.) 
6.  Position water coil in stove, replace brick and 
tighten cross draft angle nuts on side of heater to 
hold coil in place. 
7.  Install mineral wool gasket and plate on outside 
and screw tight. 
8.  Replace shrouds and heat shield. 
TANK CONNECTION
It is recommended that the ‘2 tank” system be used. The first 
tank or “Range Boiler” must remain un-insulated to dissipate any 
excess heat generated by the hot water coil. 
Connection of piping to Range Boiler must be strictly followed as 
shown in the Diagram. The 2 shut—off valves must be no smaller 
than 3/4 inch GATE valves. Make certain that the PRV (Watts 3L) 
and P&TRV (Watts 100XL) are installed in their respective loca-
tions and not vice versa. Maximum pressure setting is 150 psi. 
Do not use less than 3/4 inch diameter standard pipe between 
range boiler and heater, orientation of pipe must be slightly uphill
from the coil outlet to the upper connection at the tank, otherwise 
vapor lock will occur and water will not circulate. Minimum range 
Boiler recommended is 30 Imperial gallon capacity. 
FIG. 6 
REPLACEMENT PARTS LIST 
ITEM  QTY  DESCRIPTION  PART # 
1  1  Scandinavian baffle 8 x 18 5/8  AAP016 
2  1  Bypass damper  A237W 
3  26”  #10 Steel ball chain  R6110 
4  2  Detachable pendant 6P  R6121 
5  1  Flame deflector  A540 
6  1  Down draft baffle  A542 
7  2  Cross draft angle  A543W 
8  1  Draft control  A913 
9  1  Primary air heat exchanger  A321W 
10  19  Firebrick 1 1/4 x 4 1/2 x 9  R7101 
11  1  Door sill 3 x 16 1/8  AAP059 
12  80”  Gasket 5/8 round regular black  R7005 
13  1  Door liner  A086 
14  1  Door  A356W 
15  1  Door knob 1 7/8 OD 1/2 ID  R6020 
16  1  Door closer  A759W 
17  2  Draft/bypass handle 5/16  R6005 
18  1  Bypass bar  A334 
19  1  Draft control rod  A324W 
20  1  Bypass lever  A239W 
21  1  Smoke shield  A079W 
22  1  Draft control gasket  A989 









