GRUNDFOS INSTRUCTIONS
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4.0 Product Identification.
The PHT A unit has a silver label attached to the cabinet.
This label gives the following key information.
Fig. 1 – Product Nameplate
5.0 Operating Principles.
The function of the PHT A pressurization equipment is to continuously monitor the pressure within
hydronic pressurized heating and chilled water systems, maintaining the optimum operating
pressure by providing automatic pressurised water top when required to compensate for system
losses. (e.g. slow leaks, air venting, etc.).
The PHT A equipment will also provide signals and alarms for connection to building management
systems.
The PHT A equipment will not fill systems
The PHT A equipment will not cope with major water loss.
(e.g. System drain down, burst pipe)
The PHT A equipment is not intended to be used for water boosting applications
Please consult the appropriate datasheets for product selection
Three distinct types of unit are described in this document:
1. Standard Pressurisation Unit – Single and twin pump configurations
- Delivers water into a single system
2. Twin System Pressurisation Unit – Twin pump only
- Delivers water into two different systems
3. Glycol Pressurisation Unit - Twin pump only
- Delivers a mix of water and glycol into a single system
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