Roberts Gorden Combat HF 30 v4, Installation, Commissioning, Service & User Instructions

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CABINET HEATER
1.2 Basic Information - High Flow (HF) Models
1.2.1 Introduction
The COMBAT® HF range of cabinet heaters are designed specifically to meet the needs of designers who require a
high fan performance with the heat input that would be expected for the standard COMBAT® cabinet range of heaters.
The result of this is to produce a lower average temperature rise over the heat exchanger dependant upon the final air
flow of the installation.
High Flow Heaters are fitted with burners to the same specification as the PGP or POP 30 to 50 models for either gas
or oil firing.
COMBAT® High Flow cabinet heaters are available in 10 sizes dependent upon air flow required, with a choice of 3
heat outputs; 81kW, 115kW and 145kW.
1.2.2 Electrical Supply
The HF range of heaters all require a 400v three phase and neutral 50Hz supply to the main terminals within the heater.
1.2.3 Controls
The HF range of heaters are designed to be operated with external controls and are provided with electrical terminals
to accommodate these.
They may be controlled in the same manner as the PGP or POP models using Roberts-Gordon controls or other
suitable controls.
1.2.4 Fan Operation
All of the HF range of heaters are provided with a fan operation relay as well as the combination fan thermostat to
ensure that the fan will run correctly even though the temperature rise may be low.
The HF 40v3 and HF 50v2 to 50 v4 models are fitted with 5.5kW or 7.5kW motors that are controlled via an automatic
star/delta starter built into the heater to replace the direct on line starter used for the remainder of the range.