Gas Supply; Electrical Supply; Air Supply; Frost Protection Mode - Baxi LUNA DUO-TEC 1.70 User Manual

CAUTION
When purging installations that incorporate standing iron radiators and systems with manual vents at high points,
start with the nearest manual air vent, open the vent until water flows out, then close vent. Repeat this procedure,
working your way toward furthest air vent. Install a basket strainer in an older system if large amounts of sediment are
present. Annual cleaning of the strainer may be necessary.
WARNING
Do not use petroleum-based cleaning or sealing compounds in the boiler system. Damage to elastomer seals and
gaskets in system could occur; resulting in substantial property damage. DO NOT fill with softened water; boiler
corrosion can occur.
3.5

GAS SUPPLY

The LUNA DUO-TEC 1.70 requires a gas rate of 242.59 ft
Liquid Propane Gas (Gas E).
The LUNA DUO-TEC 1.110 requires a gas rate of 377.34 ft
for Liquid Propane Gas (Gas E).
The meter and supply pipes must be capable of delivering this quantity of gas in addition to the demand from any other appliances
in the house. The Luna DUO-TEC 1.70 requires at least a 3/4" / 19.5 mm gas supply pipe and the Luna DUO-TEC 1.110 requires
at least a 1" / 25.4 mm gas supply pipe.
WARNING
The boiler and its gas line connections must be leak tested before placing the boiler into operation.
3.6

ELECTRICAL SUPPLY

The boiler requires a 120V 60Hz power supply. Ensure the electrical supply is polarized.
The boiler must be grounded and on a dedicated circuit.
There must only be one common isolator, providing complete electrical isolation for the boiler and any external controls.
Using PVC insulated cable 18 AWGx3C 221°F (105 ºC).
All wiring must be installed in accordance with requirements of National Electrical Code and any additional national, state, or local
code requirements having jurisdiction. All wiring must be N.E.C. Class 1. Boiler must be electrically grounded in accordance with
the National Electrical Code, ANSI/NFPA No. 70-latest edition.
In Canada, installation must conform to CSA C22.1 Canadian Electrical Code Part 1 and any local codes.
3.6.1 Install Room Thermostat
Install a room thermostat on an inside wall; never install the thermostat where it will be influenced by drafts, hot or cold water pipes,
lighting fixtures, television, sun rays or near a fireplace.
3.7

AIR SUPPLY

The boiler does not require any air vents in the room in which it is installed, or when installed in a cupboard or compartment.
3.8

FROST PROTECTION MODE

The frost protection mode is built-in to the appliance and can activate if either the domestic hot water or central heating mode are
on. If the temperature falls below 39.2°F / 4.0° C the boiler will fire on its minimum setting until a flow temperature of 86°F / 30° C
is reached.
3.9

CEASE PROTECTION

The pump will automatically operate for 1 minute in every 24 hours to prevent ceasing.

3.10 GAS PIPING

Run the gas supply line in accordance with all applicable codes.
Locate and install the manual shutoff valve before the gas valve as shown in section 3: "GENERAL BOILER INFORMATION", in
accordance with state and local requirements.
WARNING
A sediment trap must be provided upstream of the gas controls.
7703477.01 (1-03/18)
/h (6.87 m /h) for Natural Gas (Gas A) and 95.04 ft
3 3
/h (10.69 m /h) for Natural Gas (Gas A) and 149.16 ft
3 3
14
/h (2.69 m /h) for
3 3
/h (4.22 m /h)
3 3