INSTALLATION OF THE OPTIONAL
HOT WATER LOOP KIT FOR PRE-
HEATING OF DOMESTIC WATER
(PA08550)
MAX CADDY FURNACE
45392A
05-06-2015
This option can be installed on either side of your Max Caddy furnace.
Step 1: Remove the screw
Figure
1
Figure
2
It is important to note that this option requires a 60 gallons buffer tank.
For installation on the right hand side, follow steps 1 to 5 of section 1.
For installation on the left hand side, follow steps 1 to5 of section 2.
Section 1
INSTALLATION OF THE HOT WATER LOOP KIT FOR PRE-HEATING OF DOMESTIC
WATER ON THE RIGHT HAND SIDE
located on the left of the
assembly as shown on
figure 1. Keep this screw to
install the “short” bracket
supplied in the hardware kit
as per figure 2.
Screw
Step 2: Remove the right panel as
Step 3
:
Slide the
hot
water loop
Figure
3
Figure
4
shown in figure 3 and save the
screws for step 5.
assembly into the furnace,
between the firebox and the heat
exchangers. It is important that
the assembly be centered on the
top of the firebox to ensure its
stability and safe installation.
(Figure 4)
Right panel
Screws (12x)
Water loop assembly
Cut view
showing position of
Step 4
: Remove the knock
-
outs from
Figure
5
Figure
6
the hot water loop above the
fire box. (Figure 5)
Short bracket
the right side panel and install the
grommets in the holes as shown on
figure 6.
Grommets (2x)
Step 5: Insert then slide the inlet and
Identify the water inlet (lowest tube)
Figure
8
Figure
7
outlet tubes of the assembly through the
grommets and secure the panel to the
furnace using the screws removed in
step 2. (Figure 7)
Right panel
Screws (12x)
and outlet (highest tube) for installation
purposes. (Figure 8)
Diagrams for the hot water loop kit
mechanical and electrical connection are
included at the end of this document.
Connections should be performed by a
qualified professional.
Water outlet
Water inlet
Section 2
Step 1: Remove the screw
Figure
10
Figure
9
INSTALLATION OF THE HOT WATER LOOP KIT FOR PRE-HEATING OF
located on the left of the
assembly as shown on
figure 9. Keep this screw to
install the “Long” bracket
supplied in the hardware
kit as per figure 10.
DOMESTIC WATER ON THE LEFT HAND SIDE
Screw
Long bracket
Step
2
: Remove the left panel as shown
in
Step 3
:
Slide the
hot
water loop
Figure
11
Figure
12
figure 11 and save the screws for step 5.
Screws (12x)
Left panel
assembly into the furnace,
between the firebox and the heat
exchangers. It is important that
the assembly be centered on the
top of the firebox to ensure its
stability and safe installation.
(Figure 12)
Water loop assembly
Cut view of the inside of the
Step 4
: Remove the knock
-
outs f
rom
Figure
13
Figure
14
furnace with the hot water loop
kit centered above the firebox.
(Figure 13)
Long bracket
the left side panel and install the
grommets in the holes as shown in
figure 14.
Grommets (2x)
Step 5
:
Insert then slide the inlet and
Identify the water inlet (lowest tube)
Figure
15
Figure
16
outlet tubes of the assembly through the
grommets and secure the panel to the
furnace using the screws removed in
step 2. (Figure 15)
and outlet (highest tube) for installation
purposes. (Figure 16)
Diagrams for the suggested hot water
loop kit mechanical and electrical
connection are included at the end of
this document.
Left panel
Screws (12x)
Water inlet
Connections should be performed by a
qualified professional.
Water outlet
WARNING
CONNECTION DIAGRAM FOR THE OPTIONAL HOT WATER LOOP KIT FOR PRE
-
HEATING
OF
TO AVOID RISK OF DAMAGE IN CASE OF WATER OVERHEATING, YOU MUST USE COPPER PIPES
TO MAKE THE CONNECTIONS BETWEEN THE TEMPERING TANK AND THE HOT WATER LOOP
KIT FOR PRE-HEATING OF DOMESTIC WATER, FOR BOTH THE INPUT AND OUTPUT OF THE
WATER LOOP ASSEMBLY.
DOMESTIC WATER
IT IS VERY IMPORTANT TO MAINTAIN AN ASCENDING SLOPE OF 2 INCHES PER FOOT
ON THE PIPE CONNECTING THE FURNACE TO THE TOP INLET ON THE BUFFER TANK.
THE BUFFER TANK USED MUST HAVE A CAPACITY OF 60 GALLONS.
HO T W ATE R
IT IS V E RY IM PO R TAN T TO
M A IN T A IN AN A S C EN D IN G
SLO P E O F 2 IN C H E S P E R
FO O T O N THE P IPE CO N N EC T IN G
TH E FU R NA C E T O THE BUF F E R T A NK
W A T ER LO O P
IN L E T
CO L D W A T E R S U PPLY
ON E W AY V ALVE
PR E S SU R E G AG E
W A TER LO O P
OU T L ET
SO L E N O ID
VALV E
TEM P ER IN G T A NK 210F/1 2 0 L B S
REL IEF V ALV E
DR A IN VA L V E
FLO O R DR A IN
RE L IEF VALV E
M A IN W A TER H EA T E R
WIRING DIAGRAM
WE RECOMMEND TO INSTALL A 24 VAC, MAXIMUM 200Ma, NORMALLY OPENED
SOLENOID VALVE ON THE INLET OF THE HOT WATER LOOP KIT TO PREVENT COLD
WATER FROM CIRCULATING IN THE FURNACE WHEN NOT IN USE. CONNECT THE VALVE
TO THE ‘’WATR SOLN’’ PORT LOCATED ON THE LEFT SIDE IN THE FURNACE’S CONTROL
BOARD.
This port will be energised when the temperature in the plenum reaches 49 °C (120° F).
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