Determining Required Flue Length; Ignition System Components; Thermostat And High Limit Controls - andrews ECOflo Series Installation And Service Manual

3.5

Ignition system components

3.6

Thermostat and high limit controls

Issue 2 14/07/16
The overall length is reduced if an elbow or condensate trap is
fitted (see below).
3.4.1

Determining required flue length

1. Determine the total length of straight concentric flue
pipe (in metres) required for the installation.
2. Add 1.2 metres of flue for every 90°C elbow.
3. Add 0.7 metres of flue for every 45°C elbow.
4. Add 1.5 metres for condensate trap.
5. Total flue length cannot exceed "Maximum Length" in
the above paragraph.
Note
Do not include the flue terminals in determining maximum
flue installation length.
Three year limited warranty on storage tank
– Heavy gauge steel automatically formed, rolled and welded to
assure a continuous seam for glass lining.
One year limited warranty on parts
Fenwal 35-655305-121 Hot Surface Ignition Control, CE listed. 3
Trials for Ignition, 15 second pre-purge timing, 15 second igniter
heat up time, 4 second trial for ignition, 24 volt input to control.
Omron G2R-1A-T-AC24 relays (VDE listed) used for high
voltage switching of hot surface igniter and combustion blower
from the 24 volt outputs of the Fenwal control.
Saint Gobain 230 volt hot surface mini igniter.
Honeywell VK8115 gas valve (negative pressure regulator)
with matched venturi sizes for mixing gas with combustion air.
EBM RG130 (36-6 and 43-9 kW/hr input sizes) and RG148 (58-
3 through 85-0 kW/hr. inputs) pre-mix combustion blowers. 230
volts, 50/60 Hz.
Burner: Acotech (Bekaert Combustion Technology) Premix
burner with stainless steel mesh outside knit.
Blocked Vent Pressure Switch: Honeywell IS20378-5770
normally closed pressure switch. Contacts open in the event of a
severe blockage of the flue outlet.
Honeywell L6189A 2043B aquastat. Temperature adjustment
range: Below 40°C to maximum of 82°C (dial stop to limit
maximum temperature). Differential set to 4°C Capillary bulb
inserts into well in top of tank. Thermostat dial adjustable on top
front section of water heater jacket.
Honeywell L6189C 2023 1 High limit control. Set point
fixed to 93°C with screw. Mounted to control panel inside
control compartment. Capillary bulb inserts into separate
well in top of tank. Manual reset control button accessible
through clearance hole in control panel.
Installation 3
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