WATERWARE COMBO20AP Mains Pressure Valve Set User Manual

: June 3, 2024
: WATERWARE

Table of Contents

WATERWARE COMBO20AP Mains Pressure Valve Set
Product Warranty
Installation Conﬁguration
Technical data
- Approximate Pressure setting
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WATERWARE COMBO20AP Mains Pressure Valve Set

WATERWARE COMBO20AP Mains Pressure-product-image

Product Warranty

To be read in conjunction with and subject to warranty conditions and exclusions found in this document. Claims that instructions were missing are not accepted as a means of avoiding this condition.
From date of purchase, Waterware Sales Ltd warrants the following to be free from manufacturing defect for 5 years on parts and labour.
Warranty conditions and exclusions;
This limited warranty is not transferable, and rests with the original householder.
If any fault arising from the manufacturing processes is found in a new product and if after consultation with Waterware, the product is returned, within the stated warranty period for that product, for inspection and or testing, Waterware will repair or exchange the product at its sole discretion. Waterware Service Ltd shall in no way be liable for any loss, damage (direct, indirect or consequential), cost or expense suﬀered or incurred by the purchaser.
Any costs associated with the removal, replacement and return of any faulty product are not accepted without prior arrangement with Waterware. Under no circumstances will such costs be accepted by Waterware for products purchased and installed in remote, rural or locations greater than 50km’s from the point of purchase.
Warranty does not apply where faults arise from;

Normal wear and tear of perishable components like working seals and surface ﬁnishes.
Normal maintenance, cleaning or tuning requirements or faults that are a result of minimum maintenance requirements not being followed.
Foreign matter in the water supplies.
Water supplies that do not meet normal expected municipal water quality standards.
Installation in a manner not in accordance with the manufacturers installation instructions or relevant NZ and or Australian Standards and local plumbing codes including G12.
Environment operating conditions that are outside the minimum and or maximum recommendations Evidence must be produced which conﬁrms the relevant product was purchased from a known customer of Waterware to validate any claim.

Obligations accepted by Waterware are in addition to all other rights and remedies had by the Purchaser in law in respect of the product and does not limit the right the Consumer may have under the Consumers Guarantee Act 1993.
Subject to the exceptions and conditions previously listed, all expressed or implied conditions, statements warranties as to the quality of ﬁtness on any purpose of a product or otherwise are hereby expressly excluded to the fullest extent permitted by law except under conditions and warrants which cannot be legally excluded by law and which are intended in the contract for the supply of the valve by the Trade Practises and any other Act of Law.

Installation Conﬁguration

Installations should ﬁrstly conform to any relevant local requirements, NZ and or Australian plumbing standards. The valve train connects directly to the bottom of the cylinder via the cylinder isolation valve.

Important tips;

The manifold inlet and cold water expansion adaptors can be swapped left to right to provide either left or right hand entry to the manifold.
The primary isolating valve provided can be located on the PRV as shown for ease of maintenance.
Use only synthetic thread seal or tape on any connections to the hot water cylinder.

Inlet Manifold (left or right hand entry)

The Inlet Manifold provides a cold water expansion valve, a cylinder drain, a 20mm check valve non-return cold water entry, a cylinder isolator and a 20mm cold balanced tempering valve feed.
Inlet manifold features

The manifold inlet and cold water expansion adaptors can be swapped left to right to provide either left or right hand entry to the manifold. The adaptors use o-ring seals and so do not require thread tape or similar.
The cylinder inlet isolator also uses o-ring seals. The ﬂow can be isolated using a spanner or similar to turn the hex shaped cap that drives the isolator spindle.

Cold water expansion valve function
The cold water expansion valve will start to vent and then discharge at a pressure greater than 8 bar inside the cylinder. As the cylinder heats and its contents expand, the volume of discharged water could reach 3% of the cylinders total capacity during the process. For example a 180 litre cylinder could vent 5.4 litres when heated from cold.
NOTE: The drain connection from the cold water expansion valve should only vent to atmosphere and not to upstream pressure. No air break is required unless the drain is over 10m in length.

To drain the hot water cylinder
To drain the hot water cylinder, turn the expansion valve knob having previously closed the cold supply. Ensure a hot water tap is open to allow air into the system and prevent a vacuum being formed in the system.
Cold water expansion valve speciﬁcations

Factory set 800kPa
Stainless steel seat
Maximum opening pressure + 20%
Minimum reseating pressure -20%
Maximum Temperature 110ºC

TV5213 Series Tempering Valve

The Caleﬃ tempering valve is adjustable from 30 – 55ºC and is preset to 55ºC but should be checked once the system has been commissioned. Remove cap and adjust using a spanner as required.

Place valve at supply source to prevent un-tempered hot water bursts from being delivered to the outlet.
Valve can be installed in vertical or horizontal position (any orientation).
Standard valves include a check valve in the cold union for domestic HWC installations.
All supply lines should be protected by a y strainer or similar.
• The valve must not be subjected to extreme temperatures either during installation or in use. In particular, avoid brazing or soldering near the valve.
Before ﬁnal installation and commissioning the system must be thoroughly ﬂushed out to ensure removal of all debris (See above on y-strainers). On older systems, it may be necessary to consider chemical cleaning (de-scaling) of the system. In known hard water areas, the use of a water softener in the system should be considered to promote ongoing trouble-free operation.

Note re:G12;
G12 requires a minimum 1m of copper pipe between the outlet of the hot water cylinder and the tempering valve. The manufacturer of the Caleﬃ tempering valve, series 5216, states there is no technical reason against installing this valve directly into the outlet of a domestic hot water cylinder providing all other standard installation instructions are followed.
Important Note;

Valve is rated for continuous hot water up to a maximum of 85ºC. Systems operating beyond this temperature will cause irrepairable damage not covered by the conditions of warranty.
The check valve installed on the cold water union to the TV provides a non-return check valve to prevent un-wanted re-circulation.

PRV20 Pressure Reducing / Limiting Valve

The Caleﬃ pressure reducing/limiting valve is adjustable from 100 – 600 kPa and is preset to 300 kPa, a pressure suited to ceramic disk taps and mixers, limiting the occurrences of water hammer.
WARNING!!
We recommend a pressure diﬀerential of 300 kPa between the cold water expansion valve setting of 800 kPa and the setting of the pressure limiting valve to minimise water loss due to expansion and prevent premature seat failure. Therefore DO NOT do not adjust the PRV higher than 500 kPa.

The pressure reducing/ limiting valve can be installed in vertical or horizontal position but not upside down.
The valve must not be submerged under water or dirt
It is recommended that the PRV is installed with all household feeds (with the possible exception of the external garden taps,) being taken from the pressure reduced side providing equal hot and cold water pressure to the appliances.
Note the PRV has its own ﬁlter which can be removed periodically for maintenance without removal of the body from line. Ensure the water supply is isolated and use a large spanner to remove the grey valve body cap. Use pliers or similar to pull the PRV cartridge from the body which reveals the strainer gauze. Replacement cartridge assemblies are available as a spare part.