page no. 24 of 48
L
NVx Range Users, Installation & Servicing Instructions Doc Ref M104 issue 1.0 Sep 2018.
Fig 2b. Exhaust only system - Type B22 vertical
Terminal
Flashing
Lengths
Adjustable Lengths
Flue Socket
Condsensate
Drain Lengths
M
ax
im
um 1
2m
, M
in
im
um 8
0Ø
=1
48
0m
m; 1
00
Ø
=1
56
0m
m; 1
30
Ø
=1
56
0m
m
Option 1:
Combustion Air Entry
(fitted with inlet grille)
Option 2:
Combustion Air Entry
(fitted with inlet grille)
We recommend installing an inline condense flue
drain when flued vertically, due to the lower flue gas
temperatures experienced when the heater is operating
at low firing rates.
Other relevant factors include installations where
significant length of the flue is used which may cause
chilling, or if heater may be exposed to high winds and
heavy rain, which may ingress the flue.
We would always recommend fitting the inline condense
drain even if the drain point is capped, should the drain be
required in the future. Any clarification can be achieved by
consulting with Powrmatic.
The condensate drainage pipe should be run in a standard
drain pipe material and have a fall of at least 2.5° in every
50m. Copper or copper based alloy shall not be used for
condensate drains. See BS 6896.
Condensate drainage pipe should run and terminate
internally to a soil and vent stack or a waste pipe.
Alternatively, the condensate can be discharged into the
rainwater system or a purpose-made soakway.
GAS VALVE
PRESSURE SWITCH
FAN COMMAND MODULE
PACTROL
BOARD
EXHAUST FAN
INTERFACE BOARD (Modulation only)
ENGINEERS SWITCH
MAINS
INPUT
CONTRACTORS
TERMINALS
BURNER LOCKOUT RESET
HIGH LIMIT RESET
HIGH LIMIT INDICATION
BURNER ON INDICATION
SECOND
HIGH LIMIT
RESET.
90-140 only