PRESTIGE Solo 60, 110, 175 and 250
HX Field Replacement
Kit
7
Installation of New Heat Exchanger
Prior to installation of the new heat exchanger,
carefully check the interior of the boiler cabinet.
Dry the cabinet / insulation when signs of mois-
ture are present. Check integrity of all wiring.
Repair / replace when necessary.
1. Lift new heat exchanger into place by engaging
the rear HX brackets (top and bottom) into the
rear boiler jacket panel provisions.
Installation of Blower/Gas Valve/Venturi Assembly
1. Mount the blower/gas valve/venturi assembly
on top of the heat exchanger. Use the new
blower gasket provided in the kit. Install 4 new
blower mounting screws (M4 x 12) ensuring
they are properly tightened and the blower is
mounted securely to the burner plate (Fig. 9).
See Table 2, page 14 for torque specifications.
Installation of Water Connection
1. Connect boiler supply piping back to supply con-
nection of new heat exchanger. Use a new boiler
piping gasket provided in the kit between heat
exchanger and supply pipe. Tighten the brass
union nut ensuring a leak tight seal. (Fig. 10).
Reinstall piping support flange (if present).
2. Connect boiler return piping back to return con-
nection of new heat exchanger. Use a new boil-
er piping gasket provided in the kit between heat
exchanger and return pipe. Tighten the brass
union nut ensuring a leak tight seal. (Fig. 10).
Use care when tightening the heat exchanger
union nuts. If excessive torque is applied to the
union nut, damage can occur to the boiler piping
or the gasket seal resulting in leakage.
3. Install cabinet gasket where heat exchanger
condensate drain nipple penetrates the cabinet.
4. Install the condensate drain assembly as shown
in Fig. 11.
NOTICE
NOTICE
1. Gas Valve
2. Venturi
3. “Straight” Gas Valve Fitting
4. Blower
Fig. 9: Prestige Burner Assembly
Boiler
Supply
Piping
Union
Nut
Boiler
Return
Piping
Union
Nut
Fig. 10: Heat Exchanger Piping Union Nuts
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