Introduction; Ancillary Options - Lochinvar TTW Series Installation, Commissioning And Maintenance Instructions

1.0

INTRODUCTION


The Lochinvar TTW is a floor standing gas-fired condensing water heater. The equipment comprises of
two stainless steel radial burner assemblies and a heat exchanger that permits fully condensing
operation.

The burners are initiated by cascaded electronic ignition sequence controls that incorporate spark
ignition and flame rectification devices for supervision of the flame.

The output from the water heater is regulated by two variable speed combustion fans and gas/air ratio
controls to maintain correct combustion at all levels of modulation. This configuration allows modulation
down to 12.5% of the rated output.

For the correct operation of the water heater, it is essential that a suitably sized pump is utilised to
maintain a constant water flow rate through the heat exchanger.

This equipment is intended for use on Group H Natural Gas (2
The information relating to propane firing is to be found in Section 15.3.This equipment MUST NOT use
gas other than that for which it has been designed and adjusted.

This equipment must be installed by a competent person, registered with a H.S.E. approved body. All
installations must conform to the relevant Gas Safety and Building Regulations. Health & Safety
requirements must also be taken into account when installing any equipment. Failure to comply with
the above may lead to prosecution.

If the equipment is to be connected to an unvented (pressurised) system, care must be taken to ensure
all extra safety requirements are satisfied should a high or low-pressure condition occur in the system.

The equipment is designed for direct connection to a flue system.

1.1 ANCILLARY OPTIONS:

Matched primary pump
Twin pipe balanced flue assemblies
Conventional flue assembly
Condensate neutralisation kit
* Visit www.lochinvar.ltd.uk for additional technical documentation
nd
Family) and LPG propane (3
LM900149A
Refer to TT Flueing Specification Document*.
Refer to TT Flueing Specification Document*.
LM900002
rd
Family).
6