42
3.2
Balancing The Herringbone System
Important. When all the heaters have
been installed the vacuum settings must
be finally balanced in the hot condition.
Before attempting to start up the heating
system it is essential to perform the preliminary
balancing of the vacuum level at each burner
unit. Isolate each heater unit by unplugging the
electrical connector and closing the gas
isolating valve.
Start all burners up and allow them to run for at
least 20 minutes.
Adjust the damper at exit of each heater using a
4mm Allen key in the damper blade securing
screw. Observing the vacuum reading using a
‘U’ tube manometer connected to the vacuum
test point (see over) each damper should be
readjusted and set at a hot condition reading as
shown in table 6 for the appropriate size of
heater and model.
Figure 20. HB Damper Assembly
3. Commissioning
Instructions.
These appliances should be commissioned by a qualified engineer.
3.1 Tools
Required.
The following tools and equipment are
advisable to complete the tasks laid out in this
manual.
Suitable alternative tools may be used.
Small Flat Head
Screwdriver
Manometer
Pozidrive
Screwdriver
Leather Faced
Gloves
4mm Allen Key
12mm
Spanner
Large Adjustable
Spanners or 22, 26 &
27mm Spanners for
fitting Of Gas Flex.
13mm
Socket
Wrench with
Extension
C
A
Ref
Description
A
Radiant Emitter Tube
B
Manifold Tube
C
Damper Blade
B
Summary of Contents for VISION VSO
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