7
Super Plus -
Installation and Servicing
Super Plus
boilers provide good load-matching sequence control
by the following method:
As the load on the boiler decreases so the return water temperature
increases.
Each module is fitted with an electronic thermostat capable of
being set to within 0.5
o
C and these thermostats sense the return
water temperature. Once the return temperature reaches 71
o
C
the modules are set to switch off at intervals, to maintain the flow
at approx. 82
o
C.
The modules switch off from left to right and from top to bottom
thus the top left module is always the first to switch off and the
bottom right the last.
The sequence control wiring centre gives a step-start operation
of the boiler.
The modules are allowed to fire only in sequence, starting from
right to left and bottom to top so that the bottom RH module is
the first to fire and the top LH is the last. This step-start prevents
excessive load on gas or electricity supplies.
The wiring centre provides facilities for wiring remote indicators/
alarm of 'Bumer On', 'Lockout' and 'Overheat' for up to 6 modules.
Provision is also made for main supply and direct connection of
any interlock devices such as the water flow system.
INSTALLATION REQUIREMENTS
CURRENT GAS SAFETY (INSTALLATION AND USE)
REGULATIONS OR RULES IN FORCE
It is the law that
all
gas appliances are installed and serviced
by a Gas Safe registered installer in accordance with the above
regulations.
Failure to install appliances correctly could lead to prosecution.
It is in your own interest, and that of safety, to ensure the law is
complied with.
In addition the installation must comply with the relevant British
Standard Specifications and Codes of Practice, viz;
BS 6880 Part 1-3 Central Heating by Low Pressure Hot Water.
BS 6644
Installation of Gas Fired Hot Water Boilers of Rated
Inputs Between 70kW and 1.8mW (net).
IGE UP/1 Soundness Testing and Purging Procedures for Non-
domestic Gas Installations.
IGE UP/2 Guidance for Installation of Gas Pipework Boosters
and Compressors for Customers Premises.
IGE UP/10 Installation of Gas Appliances in Industrial and
Commercial Premises.
IM/22
Installation Guide for High Efficiency Condensing
Boilers (Industrial and Commercial Appliances).
Note.
The
Super Plus
is a partially condensing boiler: the
condensate drain should be run in accordance with IM/22.
CP342:2
Centralised Hot Water Supply.
The installation must also conform to current building regulations,
any requirement of the local authority health and safety executive,
gas region, insurance companies and the Health and Safety at
Work Act 1985.
All wiring must conform to IEE (BS7671) Regulations for the
electrical equipment of buildings.
LEGEND
1
. Main gas pressure test point
2.
Main gas injector
3.
Pressure switch electrical leads
4.
Pressure switch
5.
Pressure switch pressure pipe
6.
Pressure switch suction pipe
7
. Pressure switch test points
8.
Gas manifold flange connection
9.
Main gas governor
10.
Main gas valve pressure test point
11.
Main gas valves
Fig.4 Gas Line - Exploded View
1
2
3
4
5
6
7
8
9
10
11
GENERAL
GENERAL
